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 291

An illustration from 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, leaf 291 — agnifiers.The ufe of this inftrument A A B B isthis: having taken the handle W fromthe inftrument (ib. n9 5.) and fcrewed itupon the button S in n I. take one ofyour flat pieces of ivory ee, or Aiders,and Aide it betwixt the two thin plates ofbrafs at E, through the body of the mi-crofcope, fo that… … \ M I C [ 2I0t ] M I C marking that you put that fide of theplate ee, where the brafs rings are,fartheft from the end A A: then youare to icrew into oo (the hollow fcrewin the end of your microfcope) the 3d,4th, &c. magnifying gins Mj whichbeing done, put the end A A clo!e toyour eye, and while…

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