Visual Word and Pseudohomophone Effect Essay Example for Free

Visual Word and Pseudohomophone Effect Essay Over the past three decades, more cognitive psychologists have paid more attention to the processes involved in visual word recognition than to almost any other subject in their field. The annals of cognitive psychology have thus burgeoned with papers on word recognition while work on other topics, many relating to other aspects of reading such as syntactic parsing or discourse memory, have been substantially less popular. There are many reasons why work in one research area can take off and flourish; reasons which are sociological and pragmatic rather than just scientific. As far as visual word recognition is concerned, there are several sociological/pragmatic factors. One relates to the advent of new technology. The development of the microcomputer provided ready access to procedures for online control of reaction time (RT) and tachistoscopic experiments, and there are few simpler stimuli to present on-line than single printed words. With simplicity comes some degree of popularity. The advent of the microcomputer stimulated research into visual word recognition in a less trivial way too, because microcomputers allowed more sophisticated experimental procedures to develop than were hitherto possible. (Johnson, Rayner, 2007) In particular, by linking computer controlled displays to eye movement recording apparatus, experimenters began for the first time to gain direct evidence of the relations between eye movements and reading. A second reason for the popularity of visual word recognition is that simple tasks are at hand, for which accurate and sensitive measures can be derived, such as lexical decision, naming, and semantic classification. Further, and perhaps most importantly, these tasks can be related to models of word recognition, in which task performance is decomposed into a series of processing stages characterized by access to different knowledge representations. An example of this is the logogen model in its revised form. This model hypothesizes the existence of separate stored representations for orthographic, semantic and phonological representations of words. Different tasks may tap into different levels of representation. For example, lexical decisions may be accomplished by monitoring activation in the orthographic lexicon; word naming will require access to the phonological lexicon (at least for words with irregular spelling-sound correspondences); semantic classification requires access to stored semantic knowledge. By using such tasks, investigators could attempt to tap and test the characteristics of the different stages in the processing system. (Perea Carreiras, 2006) Thus, visual word recognition has proved attractive because it has a broadly specified multi-stage architecture, with the stages apparently open to testing via the judicious use of different tasks. Consequently it can serve as a test-bed for experiments concerned with such general issues as how stored knowledge influences perception. A third reason for the large body of research on word recognition is that it is a basic process in reading upon which all other reading processes are predicated. Moreover, other processes in reading, such as syntactic parsing, sentence comprehension and so on, may exert only relatively weak influences on the recognition of fixated words, at least in skilled readers. In essence, skilled word identification may operate as a relatively free-standing module, and so can be studied in isolation from factors affecting other reading processes. A fourth reason is that word identification is the interface between higher- order cognitive processes (such as those concerned with text comprehension) and eye movements. The effect of such higher-order cognitive processes on eye movements can be assessed by testing whether saccadic and fixation patterns on particular words vary according to the syntactic ambiguity of the sentence or according to whether the sentence contains a garden path. Studies of the relations between eye movements and word processing therefore speaks to the general issue of how the eye movement system is controlled. Most current accounts of visual word identification assume that, in normal subjects, letter processing takes place in parallel across the word. A much more controversial issue concerns the nature of the representation that mediates lexical access. (Holcombe Judson, 2007) This controversy has a long history in both experimental psychology and education. In recent years, the traditional view that reading is parasitic upon some form of speech code has given way to the view that orthographic codes (at least in skilled readers) dominate lexical access. Pseudohomophones are nonword letter strings like PHOX that, when pronounced according to the normal spelling-sound correspondences of English, yield a pronunciation identical to that of a word (in this case FOX), which will be referred to as the base word. Pseudohomophones were pronounced more rapidly than control nonwords matched for orthographic properties. This effect, they argued, indicated some contact with lexical representations. However, they also found that pseudohomophone latency was uncorrelated with the frequency of the base word in spite of the fact that, when the base words were named, a respectable frequency effect was obtained. Pseudohomophone effect has been used for another purpose: pseudohomophones take longer to reject than control nonwords in the lexical decision task. (Crutch Warrington, 2006) Again, the performance measured must (sometimes, to some degree) be reflecting contact with lexical representations. Yet, although they obtained such a pseudohomophone effect in their study, it was uninfluenced by the frequency of the base word. Hence, they argue, this lexical contact is not frequency sensitive. The alert reader will be impatient for the link to the reading of ordinary words. The account offered by McCann and Besner is as follows. For normal reading, an orthographic code is used to access a lexicon of orthographic word forms; the best-matching entry is then mapped to a lexicon of phonological word forms via a direct connection. Pseudohomophones activate entries in the phonological lexicon (inasmuch as they do) via a different spelling-sound conversion process (the assembly process of the three-pathway model). (Ferrand, Grainger, 2003) The absence of a frequency effect for pseudohomophones coupled with evidence that they do activate lexical representations (at least to some degree) indicates that mere activation of the phonological lexicon cannot be the locus of the frequency effect for ordinary naming. Therefore this must be localized in either (activation of) the orthographic lexicon (identification in my terminology) or the mapping process (retrieval). The locus of the effect is unlikely to be the former considerations of architectural parsimony suggest that the most plausible scenario is one where either both of these lexicons are frequency sensitive, or neither of them is. (Laxon, Masterson, Gallagher Pay, 2002) It is, therefore, conclude that a principal locus of frequency effects is within the links that join the various components of lexical memory. These links are commonly described as condition- action rules for mapping representations in one domain onto representations in another domain. For word naming, the relevant condition-action rules are those that link lexical entries in the orthographic input lexicon with lexical entries in the phonological output lexicon. It will be apparent that this argument is both indirect and heavily dependent upon a dubious appeal to parsimony. There may be more specific problems with their data. Inasmuch as they are examining effects of frequency upon access to a phonological lexicon used also for auditory recognition, and inasmuch as the assembly process may be assumed to operate on the letter string from left to right, it would be appropriate to control for the effects of a variable well known to have major effects on auditory lexical decision time, namely recognition point; that is, that point in the phonological string where it diverges from other words in the lexicon. The frequency of the base-word could only modulate this difference. Modulation of such a small effect cannot be easy to detect reliably. As a benchmark, it may be noted that the range of the frequency effect in both mixed and blocked conditions was only about half the difference between words and nonwords. (Bosman, 1996) Pseudohomophones are more orthographically word-like than their control nonwords in spite of their being roughly equated in terms of summed bigram frequencies. A stimulus such as brane is often referred to as a pseudohomophone in the word-recognition literature because it sounds like a real word despite the fact that it does not spell one. A common finding is that subjects in the lexical-decision task are slower to respond no to pseudohomophones like brane than to control items like frane. A related finding is seen in the naming task, except that the direction of the effect is reversed. Pseudohomophones like brane are named faster than control items like frane. (Ferrand Grainger, 1992) Pseudohomophones have also been used to explore differences between good poor young readers, differences between left and right hemisphere processing, sub-typing of young readers, mechanisms of spelling-to-sound-translation, dyslexic reading, types, of phonological codes and to identify the locus of word frequency effects in word recognition, identification and production. The standard explanation for these effects assumes that assembled phonology makes contact with lexical entries in the phonological lexicon. In the case of the lexical-decision task, this impairs performance because the output from the phonological lexicon signals the presence of a word (the phonological representation of brain) while the output from the orthographic lexicon signals that it is not a word, because there is no orthographic entry corresponding to brane. Resolving this conflict takes time. (Martin, 1982) In naming the process of assembling phonology for a visually presented nonword letter string that corresponds to a real word in the phonological domain is more efficient because of the interaction with a whole word representation in the phonological lexicon; nonwords that do not sound like a real word are denied this benefit. Because the presence of pseudohomophone effects in naming and lexical decision is embarrassing to a model which purports to give an account of these tasks, the tack they pursue is that pseudohomophone effects, when they are present in experiments, are not phonological in nature but simply reflect the fact that pseudohomophones are orthographically more similar to real words known to the reader than are the control items. (Rapcsak, Henry, Teague, Carnahan Beeson, 2007) Therefore, if pseudohomophones and control items are matched in terms of the orthographic and phonological error scores produced by the model, there will be no pseudohomophone effect in either naming or lexical decision. Indeed, this is the result they reported in one of their experiments. The application of pseudohomophones in lexical decision and priming paradigms for the study of adults with a history of developmental language disorders (DLD) has a distinct advantage over more explicit tests of phonological decoding such as nonword reading. With lexical decision measures it is possible to examine the early time course of phonological access and these techniques have been used effectively with a variety of patient populations that exhibit phonological processing deficits. The tasks tap implicit phonological awareness that may be present in the absence of explicit demonstrations that it exists. Based on previous research, it is predicted that the college-aged DLD readers in our study have phonological deficits that impact their word recognition ability and that this group will show less phonological awareness than their age-matched peers. (Simon, Petit, Bernard Rebai, 2007) Thus, our predictions for the current research are as follows. In the first experiment, a lexical decision task with pseudohomophones and orthographically controlled nonwords, it is predicted that control participants will show a typical pseudohomophone effect with slower and less accurate responses to pseudohomophones than to orthographic control nonwords. In contrast, it is predicted that the DLD group will not be as strongly influenced by the conflicting phonological information present in the pseudohomophone stimuli and will not show such an effect. In the second experiment investigating pseudohomophone semantic priming (e. g. , RANE-CLOUD) it is predicted that the non-DLD participants will produce reduced reaction times for target words when they are preceded by semantically related pseudohomophones. This predicted pattern of results would be consistent with the view that adults with a history of DLD continue to have phonological processing deficits. References Bosman AM; de Groot AM; Phonologic mediation is fundamental to reading: evidence from beginning readers.The Quarterly journal of experimental psychology A, Human experimental psychology; 1996 Aug; 49(3); p. 715-44 Crutch SJ; Warrington EK; Word form access dyslexia: understanding the basis of visual reading errors. Quarterly journal of experimental psychology (2006); 2007 Jan; 60(1); p. 57-78 Ferrand L; Grainger J; Homophone interference effects in visual word recognition. The Quarterly journal of experimental psychology A, Human experimental psychology; 2003 Apr; 56(3); p. 403-19 Ferrand L; Grainger J; Phonology and orthography in visual word recognition: evidence from masked non-word priming. The Quarterly journal of experimental psychology A, Human experimental psychology; 1992 Oct; 45(3); p. 353-72 Holcombe AO; Judson J; Visual binding of English and Chinese word parts is limited to low temporal frequencies. Perception; 2007; 36(1); p. 49-74 Johnson RL; Rayner K; Top-down and bottom-up effects in pure alexia: Evidence from eye movements. Neuropsychologia; 2007 Mar 7 Laxon V; Masterson J; Gallagher A; Pay J; Childrens reading of words, pseudohomophones, and other nonwords. The Quarterly journal of experimental psychology A, Human experimental psychology; 2002 Apr; 55(2); p. 543-65 Martin RC; The pseudohomophone effect: the role of visual similarity in non-word decisions. The Quarterly journal of experimental psychology A, Human experimental psychology; 1982 Aug; 34(Pt 3); p. 395-409

Cloning :: Biology Cloning

For the last few decades, cloning was a fictitious idea that lay deep within the pages of some sci-fi novels. The very idea that cloning could one day become reality was thought to be a scientific impossibility by many experts but on one exhilarating day, what was thought to be "purely fiction" became reality. That fine day was February 22, 1997. A team from the Roslin Institute which was lead by Dr. Ian Wilmut changed the face of history forever by revealing what looked like an average sheep. That sheep was what was going to be one of the most famous if not the most famous sheep in modern day. Dolly was this seven month old Trojan lamb's name and Dolly was the first ever clone of a mammal. She was an exact biological carbon copy, a laboratory counterfeit of her mother. In essence, Dolly was her mother's biological twin. What surprised most thought, was not just the fact that Dolly was a clone but was that the trick to Wilmut and his team's success was a trick that was so ingenious yet so simple that any skilled laboratory technician could master it. Therein, lied a pathway towards a new future. This news shocked the world for Dolly was the key to many new and prosperous possibilities. But Dolly was not the first clone ever. Cloning of a more limited sort had been done before her. Creatures such as mice, frogs and salamanders had been cloned from as early as the 1950's. Then, a different procedure was used. This procedure included the destruction of the nucleus inside the egg cell. Then a new "donor" cell would be brought and injected into the egg cell as a replacement. The egg would then grow into an progeny of the same genetic make-up as the donor. Later on in the 1970's a new technique was developed. This technique included transferring the genes from one organism to another by combining the DNA from a plant or animal cell with the DNA in bacteria. When the bacteria divided the cells were now the clones of both plant/animal DNA as well as the DNA it had originally. This cloning technique allowed for the growth of many endocrine system treatments such as hormone, insulin and interferon. In 1993, researchers in the US began and successfully cloned a human embryo in order to develop new ways to treat human infertility.

Gay marriage speech Essay

Today the topic that is up for debate is gay marriage I will be arguing that gay marriage should be allowed in Australia. My name is Santika I hope that I will be able to show you why gay marriage should be allowed in Australia. I will now define what gay is the meaning of gay is when a person man or women like the same sex. I’ll define what marriage means the meaning of marriage is when two people commit their love in front of friends and family. They become one and if your religious confess their love to god. I will prove to you why gay marriage should be allowed by giving you reasons that will hopefully convince you. Last year the government had said that the gays could get married in Canberra over the weekend and so they did only to have their marriages annulled. 5 days later by the government which is wrong. Because there wasting valuable money on a trip that wouldn’t have been worth it. I’m going to show you statistics on how may people would care if gays could get legally married or not. 64% percent of people say yes to it that’s more then half of the country saying yes so why can’t it happen. It isn’t fair on them because all they want is the same equal rights. But the government doesn’t want to allow it because they don’t see it as being right which is completely unfair. Another point I wish to make is the mardi gras festival if our country can have a festival dedicated to the gays. Why can’t we allow same sex marriage what is the point in this festival I mean the festival shows our government is supporting gays? It is completely wrong and our government should consider allowing same sex marriage. My final point I’m going to make on this issue is that there are a number priests and minsters who support gay marriage. Now as most people would think people of the church are against this issue as the bible. supposedly says that gay people are not allowed and that it’s wrong but surprisingly they support it. Now if people who worship god and don’t get married for god can accept this. Then our government should be able to support it and give  it the go ahead. Just to recap everything I think the government should allow same sex marriage if more then half of this country can do it. If we have a festival for it and priest and minsters that support it then it should be allowed.

Biography of James Watt, Modern Steam Engine Inventor

James Watt (January 19, 1736–August 25, 1819) was a Scottish inventor, engineer, and chemist. He developed a workable steam engine that utilized a separate condenser; this innovation made the steam engine a useful tool for a vast range of uses. In many ways, Watts invention—or rather, his improvement on an earlier invention, the Newcomen steam engine—was the technological impetus behind the Industrial Revolution. Fast Facts: James Watt Known For: Invention of the steam engineBorn: January 19, 1736 in Greenock,  Renfrewshire, Scotland, United KingdomParents: Thomas Watt, Agnes MuirheadDied: August 25, 1819 in  Handsworth, Birmingham, England, United KingdomEducation: Home educatedPublished Works:  A System of Mechanical PhilosophyAwards and Honors: Many streets and schools carry his name; statues of his likeness in Picadilly Gardens and St. Pauls CathedralSpouse(s): Margaret (Peggy) Miller, Ann MacGregorChildren: James Jr., Margaret, Gregory, Janet, AnnNotable Quote: I had gone to take a walk on a fine Sabbath afternoon. I had entered the Green by the gate at the foot of Charlotte  Street and had passed the old washing house. I was thinking upon the engine at the time, and had gone as far as the herds house, when the idea came into my mind...I had not walked  farther  than the Golf  house when the whole thing was arranged in my mind. Early Life James Watt was born on January 19, 1736, in Greenock, Scotland, as the only surviving child of four of James Watt (1699–1737) and Agnes Muirhead (1901–1754). Greenock was a fishing village that during Watts lifetime became a busy town with a fleet of steamships. James Jr.s grandfather Thomas Watt (1642–1734) was a well-known mathematician and local schoolmaster. James Sr. was a prominent citizen of Greenock and a successful carpenter and ships chandler who worked at outfitting ships and working on their instruments, compasses, and quadrants. At various times, James Sr. was also the chief magistrate and treasurer of the town. Education James Watt was intelligent, but because of poor health he was unable to attend school regularly. Instead, he gained the skills he would later need in engineering and tooling by working with his father on carpentry projects. By age 6, James Watt was solving geometrical problems and conducting his earliest investigation into the nature of steam, which involved experimenting with his mothers tea kettle. In boyhood, Watt was an avid reader and found something to interest him in every book that came into his hands. When Watt was finally sent to the village school, his ill health prevented his making rapid progress; it was only when he was 13 or 14 that he began to exhibit his abilities, particularly in mathematics. His spare time was spent sketching with his pencil, carving, and working at the tool bench with wood and metal. He made many ingenious mechanical works and some beautiful models, and enjoyed repairing nautical instruments. Apprenticeship After his mother died in 1754, the 18-year-old Watt was sent to Glasgow to train as a merchant with his uncle John Muirhead. One of his mothers relatives was the chair of the Oriental Languages and Humanities department at Glasgow College, and Watt became a member of the literary society there. He also met other scholars at Glasgow who would prove influential and supportive of his career: Robert Dick, professor of natural philosophy, Robert Simpson in mathematics, and William Cullen in medicine and chemistry. It was Dick who suggested that Watt go to London to get training as a mathematics instrument maker. With a letter of introduction, Watt left for London in 1755 and began working with the instrument maker John Morgan. Watt was not officially an apprentice, but he did work on mechanical instrumentation: Morgan thought he was talented but took too long to complete his work. The job with Morgan ended in June 1756 and Dick got him a short-term position to work on an astronomical clock, reflecting telescopes, and transit instruments. Watt returned to Greenock at the end of the year, but he soon went back to Glasgow where he began a small business in quadrant-making. He was appointed mathematical instrument-maker at Glasgow College, supported by Dicks replacement John Anderson, and by Cullens replacement and chemist Joseph Black (1728–1799). Black is best known for his work on latent and specific heats and for his discovery of carbon dioxide, and he was to become a staunch supporter of Watt. Early Experimentation In 1759, John Robison, a student at Glasgow, showed Watt a model of the Newcomen steam engine and suggested it might be used to propel carriages. The Newcomen was invented and patented in 1703 by Thomas Newcomen (1664–1729), and Watt began building miniature models using tin steam cylinders and pistons attached to driving wheels by a system of gears. In his own experiments he used, at first, apothecaries trials and hollow canes for steam reservoirs and pipes, and later a Papins digester and a common syringe. The latter combination made a noncondensing engine, in which he used steam at a pressure of 15 pounds per square inch. The valve was worked by hand, and James Watt saw that an automatic valve gear was needed to make a working machine. This experiment, however, led to no practical result and for the next several years, he abandoned this research. Watt stayed with the college until the 1760s, when he took up a partnership with a merchant named John Craig, financed partly with Black. One venture of theirs was producing alkali from salt—in the 18th century, alkali could only be produced from plants. Craig and Watt were one of several people looking for a way to create it chemically, an effort not achieved until 1820. Watt and Craig also worked on pottery kilns and glazes for making tin-glazed delftware. Marriage and Family In 1764, Watt married Margaret Millar, known as Peggy, a cousin he had known since they were children. They were to have five children, only two of which lived to adulthood: Margaret, born in 1767, and James III, born in 1769, who as an adult would become his fathers main support and business partner. The Newcomen Steam Engine Over the winter of 1763–1764, John Anderson at Glasgow asked Watt to repair a model of the Newcomen engine. He was able to get it running, but he was curious as to why the machine consumed so much steam and condensing water. Watts began studying the history of the steam engine and conducted experimental research into the properties of steam. The Newcomen steam engine model had a boiler that was made to scale and was incapable of furnishing enough steam to power an engine. It was about nine inches in diameter; the steam cylinder was two inches in  diameter and had a  six-inch  piston stroke. Watt made a new boiler that could measure the quantity of water evaporated and the steam condensed at every stroke of the engine. Watt soon discovered that the engine required a very small quantity of steam to heat a very large quantity of water. He immediately started to determine with precision the relative weights of steam and water in the steam cylinder when condensation took place at the down stroke of the engine. James Watt independently proved the existence of latent heat, which had been discovered by his mentor and supporter Joseph Black. Watt went to Black with his research, who shared his knowledge with Watt. Watt found that, at the boiling point, his condensing steam was capable of heating six times its weight of water used for producing condensation. Watts Separate Condenser Realizing that steam weight for weight was a vastly greater absorbent and reservoir of heat than water, Watt saw the importance of taking greater care to economize it than had previously been attempted. At first, he economized in the boiler and made boilers with wooden shells in order to prevent losses by conduction and radiation. He also used a larger number of flues than Newcomen had to secure  more complete  absorption of the heat from the furnace gases. He also covered his steam pipes with  non-conducting  materials and took every precaution to secure the complete utilization of the heat of combustion. He soon discovered that the sources of heat loss in the Newcomen engine ­ were: The dissipation of heat by the cylinder itself, which was of brass and was both a good conductor and a good radiator.The loss of heat consequent upon the necessity of cooling down the cylinder at every stroke in producing the vacuum.The loss of power due to the pressure of vapor beneath the piston, which was a consequence of the imperfect method of condensation. His first attempt at a cylinder of  non-conducting  material was made of  ­wood soaked in oil and then baked, which did increase the economy of steam. He then conducted a series of very accurate experiments upon the temperature and pressure of steam by measuring the amount of steam used at each stroke of the engine. He was able to confirm his previous conclusion that three-fourths of the heat supplied to the engine was wasted. Further Improvements After his scientific investigations, James Watt worked on improving the steam engine with an intelligent understanding of its existing defects and a knowledge of their cause. Watt soon saw that in order to reduce the losses in the working of the steam in the steam cylinder, it would be necessary to find a way to constantly keep the cylinder as hot as the steam that entered it. According to James Watt: The idea came into my mind that, as steam was an elastic body, it would rush into a vacuum, and, if a communication were made between the cylinder and an exhausted vessel, it would rush into it, and might be there condensed without cooling the cylinder. I then saw that I must get rid of the condensed steam and injection water if I used a jet, as in Newcomens engine. Two ways of doing this occurred to me: First, the water might be run off by a descending pipe, if an off jet could be got at the depth of 35 or 36 feet, and any air might be extracted by a small pump. The second was, to make the pump large enough to extract both water and air. He continued, When analyzed, the invention would not appear so great as it seemed to be. In the state in which I found the steam engine, it was no great effort of mind to observe that the quantity of fuel necessary to make it work would forever prevent its extensive utility. The next step in my progress was equally easy—to inquire what was the cause of the great consumption of fuel. This, too, was readily suggested, viz., the waste of fuel which was necessary to bring the whole cylinder, piston, and adjacent parts from the coldness of water to the heat of steam, no fewer than from 15 to 20 times in a minute. James Watt had invented his all-important separate condenser. He proceeded to make an experimental test of his new invention. His little model worked very well, and the perfection of the vacuum was such that the machine lifted an 18-pound weight suspended from the piston rod. He then constructed a larger model, and the result of its test confirmed the results of his first experiments. Watt Builds His Own Steam Engine It took years for Watt to figure out the details of the new steam engine. To start with, Watt had to find a way to prevent the condenser from filling with water. He tried several approaches, including an air pump, which relieved the condenser of the water and air which collected in the  condenser and lessened the vacuum. He next substituted oil and tallow for the water used to lubricate the piston, keeping the steam tight and preventing the cooling of the cylinder. Another cause of refrigeration of the cylinder and consequent waste of power in its  operation was the entrance of air, which followed the piston down the cylinder at each stroke, cooling its interior by its contact. The inventor prevented this from happening by covering the top of the cylinder and surrounding the whole cylinder with an external casing, or steam jacket, that allowed the steam from the boiler to pass around the steam cylinder and press on the upper surface of the piston. After building his larger experimental engine, Watt rented a room in an old deserted cottage. There, he worked with mechanic Folm Gardiner. Watt had just met John Roebuck, a wealthy physician, who had, with other Scotch capitalists, recently founded the celebrated Carron Iron Works. Roebuck began to support Watts efforts financially and Watt frequently wrote to Roebuck  describing  his progress. In  August 1765, he tried the small  engine and wrote Roebuck that he had good success, although the machine was very imperfect, and informed Roebuck that he was starting to make the larger model. In  October 1765, he finished the large steam engine. The engine, while ready for trial, was still far from perfect. It nevertheless did good work for such a crude machine. Financial and Personal Setbacks Unfortunately, by 1765, James Watt was reduced to poverty, and, after borrowing considerable sums from friends, he finally had to seek employment in order to provide for his family. During a span of about two  years, he supported himself as a civil engineer, surveying and managing the building of several canals in Scotland and exploring coal fields in the neighborhood of Glasgow for the magistrates of the city. He did not, however, entirely give up his invention. In 1767, Roebuck assumed Watts liabilities to the amount of  1,000 British pounds and agreed to provide more capital in exchange for  two-thirds  of Watts patent. Another engine was built with a steam cylinder seven or eight inches in diameter, which was finished in 1768. This worked sufficiently well to induce the partners to ask for a patent, and the specifications and drawings were completed and presented in 1769. Watt also built and set up several Newcomen engines, partly, perhaps, to make himself more thoroughly familiar with the practical details of engine building. Meantime, he prepared plans for and built a moderately large engine of his own new type. Its steam cylinder was 18 inches in diameter, and the stroke of the piston  was 5 feet. This engine was built at  Kinneil and was finished in  September 1769. It was not all satisfactory in either its construction or its operation. The condenser was a surface condenser composed of pipes somewhat like those used in his first little  model and did not prove to be satisfactorily tight. The steam piston leaked seriously, and repeated trials only served to make its imperfections more evident. He was assisted with financial and moral support by both Joseph Black and John  Roebuck, but  he felt strongly about the risks he ran of involving his friends in serious losses and became very despondent. Writing to Black, Watt said: Of all things in life, there is nothing more foolish than inventing; and probably the majority of inventors have been led to the same opinion by their own experiences. Partnership With Matthew Boulton In 1768, James Watt traveled to London to get his patent submitted, and on the way he met Matthew Boulton. Boulton was the owner of a Birmingham manufacturing company known as the Soho Manufactory, which made small metal goods. He  had inherited his fathers business and built it up considerably. He and his business were very well known in the mid-18th century English enlightenment movement. Boulton was a good scholar,  with a considerable knowledge of languages and science—particularly mathematics—despite having left school as a boy to go to work in his fathers shop. In the  shop, he soon introduced a number of valuable improvements and he was always on the lookout for other ideas that might be introduced into his business. He was also a member of the famous Lunar Society of Birmingham, a group of men who met to discuss natural philosophy, engineering, and industrial development together: other members included the discoverer of oxygen Joseph Priestley, Erasmus Darwin (grandfather of Charles Darwin), and the experimental potter Josiah Wedgewood. Watt joined the group after he became Boultons partner. A flamboyant and energetic scholar, Boulton made the acquaintance of Benjamin Franklin in 1758, who then visited Soho. By 1766, these distinguished men were corresponding, discussing among other things the applicability of steam power to various useful purposes. They designed a new steam engine and Boulton built a model, which was sent to Franklin and exhibited by him in London. They had yet to become aware of the existence of James Watt. When Boulton met Watt in 1768, he liked his engine and decided to buy an interest in the patent. With Roebucks consent, Watt offered Boulton a  one-third  interest. Although there were several complications, eventually Roebuck proposed to transfer to Matthew Boulton  one-half  of his proprietorship in Watts inventions for the sum of 1,000 pounds. This proposal was accepted in  November 1769. Working Steam Engines In  November 1774, Watt finally announced to his old partner Roebuck that he had made a successful trial of the Kilmeil engine. He did not write with his usual enthusiasm and extravagance; instead, he simply wrote: The fire engine I have invented is now going, and answers much better than any other that has yet been made, and I expect that the invention will be very beneficial to me. One reason for his lack of enthusiasm was that his wife had died during childbirth the previous year, in September 1773. Heartsick, Watt buried himself in work. From mid-February 1774 he was working on thermometers and barometers. He ended his civil engineering business in Scotland (in part because of a financial crisis in Scotland) and in May he journeyed south to Birmingham, where he joined the Lunar Society. In 1775, he went into a full-time partnership with Matthew Boulton. From that point forward, the firm of Boulton and Watt was able to produce a range of working engines with real-world applications. New innovations and patents were taken out for machines that could be used for grinding, weaving, and milling. Steam engines were put into use for transportation on both land and water. Nearly every successful and important invention that marked the history of steam power for many years originated in the Boulton and Watt workshops. Retirement and Death Watts work with Boulton transformed him into a figure of international stature among men of letters. His 25-year-long patent brought him wealth; and he and Boulton became leaders in the technological Enlightenment in England, with a solid reputation for innovative engineering. Watt married Ann Macgregor in 1776 and they had two children (Gregory and Jessy), both of whom would die young. James Watt Jr., his son from his first wife, survived his father and went on to have a role in the continuing English Enlightenment. As a result of his partnership with Matthew Boulton, James Watt became a very wealthy man, building an elegant mansion known as Heathfield House in Handsworth,  Staffordshire. He retired in 1800 and spent the rest of his life in leisure and traveling to visit friends and family. He died on August 25, 1819, at Heathfield. He was buried in the graveyard of  St Marys Church in Handsworth. Legacy In a very meaningful way, Watts inventions spurred on the Industrial Revolution and innovations of the modern age, ranging from automobiles and trains to factories and the social issues that evolved as a result. In addition, Watts name has been attached to streets, museums, and schools. His story has inspired books, movies, and works of art, including statues in Piccadilly Gardens and St. Pauls Cathedral. On the statue at St. Pauls are engraved the words: James Watt...enlarged the resources of his country, increased the power of man, and rose to an eminent place among the most illustrious followers of science and the real benefactors of the world. Sources Jones, Peter M. Living the Enlightenment and the French Revolution: James Watt, Matthew Boulton, and Their Sons. The Historical Journal 42.1 (1999): 157–82. Print.Hills, Richard L. Power from Steam: A History of the Stationary Steam Engine. Cambridge: Cambridge University Press, 1993.Miller, David Philip. Puffing Jamie: The Commercial and Ideological Importance of Being a ‘Philosopher’ in the Case of the Reputation of James Watt (1736–1819). History of Science 38.1 (2000): 1–24. Print.The Life and Legend of James Watt: Collaboration, Natural Philosophy, and the Improvement of the Steam Engine. Pittsburgh: University of Pittsburgh Press, 2019.  Pugh, Jennifer S., and John Hudson. The Chemical Work of James Watt, F.R.S. Notes and Records of the Royal Society of London 40.1 (1985): 41–52. Print.Russell, Ben. James Watt: Making the World Anew. London: Science Museum, 2014.  Wright, Michael. James Watt: Musical Instrument Maker. The Galpin Soci ety Journal 55 (2002): 104–29. Print.