A new and complete dictionary of arts and sciences : comprehending all the branches of useful knowledge, with accurate descriptions as well of the various machines, instruments, tools, figures, and schemes necessary for illustrating them, as of the classes, kinds, preparations, and uses of natural productions, whether animals, vegetables, minerals, fossils, or fluids : together with the kingdoms, provinces, cities, towns, and other remarkable places throughout the world : illustrated with above three hundred copper-plates, engraved by Mr. Jefferys, geographer to His Majesty : the whole extracted from the best authors in all languages (1763)
Society of Arts (Great Britain). Society of Gentlemen, Jefferys, Thomas, -1771, Grignion, Charles, 1721-1810, Wale, Samuel, d. 1786, Owen, W. (William), d. 1793 · London : Printed for W. Owen, at Homer's Head, in Fleet-Street · leaf 14
ch fall nearerto B, or farther towards L, being un-concerned in this production, a. Theinternal how is produced by two re-fractions and one reflection. The firftrefraction is of the incident rays ex-tremely near AN, by which they pio-ceed from N to one common point orfocus at F, from whence they… … ^/■;/•■//•-«/•<••«</> R A 1 [ 270* ] •/ (nould be refracted together to the pontP, that being reflected together fromthence to G they may there go out pa-rallel, and fo come in quantity fufficientto excite the fenfation of colours in aftrong and lively manner. Now thofeiays, and thole…
Art · Science
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