Deals with the history of eyeglasses from their invention in Italy ca. 1286 to the appearance of the telescope three cent. later. "By the end of the 16th cent. eyeglasses were as common in western and central Europe as desktop computers are in western developed countries today." Eyeglasses served an important technological function at both the intellectual and practical level, not only easing the textual studies of scholars but also easing the work of craftsmen/small bus. During the 15th cent. two crucial developments occurred: the ability to grind convex lenses for various levels of presbyopia and the ability to grind concave lenses for the correction of myopia. As a result, eyeglasses could be made almost to prescription by the early 17th cent. Illus.

Francis Watkins was an eminent figure in his field of mathematical and optical instrument making in mid-eighteenth century London. Working from original documents, Brian Gee has uncovered the life and times of an optical instrument maker, who - at first glance - was not among the most prominent in his field. In fact, because Francis Watkins came from a landed background, the diversification of his assets enabled him to weather particular business storms - discussed in this book - where colleagues without such an economic cushion, were pushed into bankruptcy or forced to emigrate. He played an important role in one of the most significant legal cases to touch this profession, namely the patenting of the achromatic lens in telescopes. The book explains Watkins's origins, and how and why he was drawn into partnership with the famous Dollond firm, who at that point were Huguenot incomers. The patent for the achromatic telescope has never been satisfactorily explained in the literature, and the author has gone back to the original legal documents, never before consulted. He teases out the problems, lays out the evidence, and comes to some interesting new conclusions, showing the Dollonds as hard-headed and ruthless businessmen, ultimately extremely successful. The latter part of the book accounts for the successors of Francis Watkins, and their decline after over a century of successful business in central London.

From keys and handkerchiefs to sweets and rubber bands, the curious objects we surround ourselves with, though often seemingly mundane, have a magical quality. Their surprising power to disturb, soothe, seduce or absorb give these quirky objects histories and meanings we rarely ponder. Yet we would be lost without them. Take bags, for example. Why do most women carry handbags, while men rely on pockets? Why do so many houses have bags of bags? And why do we 'let the cat out the bag' or 'give someone the sack'? What significance do our bags hold for us? In this highly imaginative and entertaining book, Steven Connor embarks on a historical, philosophical and linguistic journey that explores our relationships with the curious things with which we have a forgotten but daily intimacy.

The “revolutionary, scintillating book” in which Galileo revealed his wondrous astronomical discoveries, with accompanying notes and historical context (Metascience). Galileo Galilei’s Sidereus Nuncius is arguably the most dramatic scientific book ever published. It announced new and unexpected phenomena in the heavens, “unheard of through the ages,” revealed by a mysterious new instrument. Galileo had ingeniously improved the rudimentary “spyglasses” that appeared in Europe in 1608, and in the autumn of 1609 he pointed his new instrument at the sky, discovering astonishing sights: mountains on the moon, fixed stars invisible to the naked eye, individual stars in the Milky Way, and four moons around the planet Jupiter. These discoveries changed the terms of the debate between geocentric and heliocentric cosmology and helped ensure the eventual acceptance of the Copernican planetary system. Albert Van Helden’s beautifully rendered and eminently readable translation is based on the Venice 1610 edition’s original Latin text. An introduction, conclusion, and copious notes place the book in its historical and intellectual context, and a new preface, written by Van Helden, highlights recent discoveries in the field, including the detection of a forged copy of Sidereus Nuncius, and new understandings about the political complexities of Galileo’s work.

The eye chart—essential diagnostic tool, template, sign, toy—is a monument to un-reading and a guide to the absurdities of modern life.

Maybe the Dark Ages Weren’t So Dark Afterall… Here are some facts you probably didn’t learn in school: People in the Middle Ages did not think the world was flat—in fact, medieval scholars could prove it wasn’t The Inquisition never executed anyone because of their scientific ideas or discoveries (actually, the Church was the chief sponsor of scientific research and several popes were celebrated for their knowledge of the subject) It was medieval scientific discoveries, methods, and principles that made possible western civilization’s “Scientific Revolution” If you were taught that the Middle Ages were a time of intellectual stagnation, superstition, and ignorance, you were taught a myth that has been utterly refuted by modern scholarship. As a physicist and historian of science James Hannam shows in his brilliant new book, The Genesis of Science: How the Christian Middle Ages Launched the Scientific Revolution, without the scholarship of the “barbaric” Middle Ages, modern science simply would not exist. The Middle Ages were a time of one intellectual triumph after another. As Dr. Hannam writes, “The people of medieval Europe invented spectacles, the mechanical clock, the windmill, and the blast furnace by themselves. Lenses and cameras, almost all kinds of machinery, and the industrial revolution itself all owe their origins to the forgotten inventors of the Middle Ages.” In The Genesis of Science you will discover Why the scientific accomplishments of the Middle Ages far surpassed those of the classical world How medieval craftsmen and scientists not only made discoveries of their own, but seized upon Eastern inventions—printing, gunpowder, and the compass—and improved them beyond the dreams of their originators How Galileo’s notorious trial before the Inquisition was about politics, not science Why the theology of the Catholic Church, far from being an impediment, led directly to the development of modern science Provocative, engaging, and a terrific read, James Hannam’s Genesis of Science will change the way you think about our past—and our future.

This is the first full-length study of spectacles in the Victorian period. It examines how the Victorians shaped our understanding of functional visual capacity and the concept of 20:20 vision. Demonstrating how this unique assistive device can connect the histories of medicine, technology and disability, it charts how technology has influenced our understanding of sensory perception, both through the diagnostic methods used to measure visual impairment and the utility of spectacles to ameliorate its effects. Taking a material culture approach, the book assesses how the design of spectacles thwarted ophthalmologists’ attempts to medicalise their distribution and use, as well as creating a mainstream marketable device on the high street.