Yesterday, a student reported this IELTS cue card: Describe an Invention for speaking part 2. IELTS speaking topics can often be repeated so you should definitely prepare for this topic as well as other recent topics and common topics. I’ve provided links below.
In January of 1839, stimulated by Talbot's announcement of his invention of photogenic drawing, Herschel took up the study of photographic phenomena. Within a week he had solved the problem of silver fixation. In contrast to Talbot's single-minded pursuit of the silver image, however, Herschel soon began to widen his investigations in the search for other viable photographic systems. The primary sources for this account of Herschel's work are his handwritten experimental notes, memoranda, and test prints, and his published scientific papers that sprang from them. Herschel's experimental notebooks are in the Library of the Science Museum, London, but there is a lacuna in the record over the crucial period of 1841-5. Some original documents spanning this period are held in the Herschel archive of the Harry Ransom Humanities Research Center (HRHRC), at the University of Texas at Austin. For brevity, these will be referred to henceforth as the 'Memoranda'. Some of the specimen prints described in the Memoranda are at HRHRC, but the majority are still in Britain, divided between the Museum of the History of Science at Oxford, and the National Museum of Photography, Film & Television at Bradford. Herschel's correspondence, together with the drafts of his published papers and a few test prints, are held in the library of the Royal Society, London. There is a chronological list of 'prepared papers' in the Memoranda, in which a sequential number is allocated to each preparation of chemicals coated on paper, which might prove light-sensitive. It will be convenient to refer to this as the 'prepared paper number'. Herschel's Memoranda reveal that by February of 1840 he had carried out nearly seven hundred such photochemical experiments, using silver salts almost exclusively, although many of these coated sheets were divided up into smaller pieces, and each thereby sufficed for several different tests.
IELTS Cue Card Sample 200 - Describe what you want …
Technology is a knowledge of using tools and machines to do tasks more efficiently. Technology has made the life easier and better. Science and Technology are making advances at a surprising rate such as, from telephones to the Internet, calculators to computers, and cars to satellites. We are part of a new world of discoveries and inventions made possible by Science. Communicating using technology has changed our cultures and our lifestyles. The technology that surrounds almost everyone in the modern society, affects both work and recreational activities. Technology is one of the principal driving forces of the future; it is transforming our lives and shaping our future at incomparable rates in history. Technology is constantly changing, and advancing.
OR Which is the best invention ..
Whether it is more apt to describe cyanotype as invented - or discovered - by Sir John Herschel in 1842, is a question the reader may decide by the end of this essay. Whatever the verdict, it is well-known that this process of photographic contact-printing in Prussian blue was brought to light just three years after Louis Daguerre and Henry Talbot had announced their independent inventions of photography in silver, using metal and paper substrates, respectively.
27/07/2017 · IELTS Cue Card: An Invention
Why is it important? What will be the specific impact?
“Describe an invention/trend/institution that will shape the future of the world in the next 20 years. Why is it important? What will be the specific impact?” from 3 options, as I was recently investigating similar one.