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 940

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 940 — emote paint, F, whofe diftanceis to !-e mealured, be feen through thefixed fights : and bringing the index tobe parallel with the other fide of the in-ftrument, obferve through its fights anyacceflible mark B, at a diftance ; thencarrying the inftrument to the point B,let the immoveable fights be… … Q^U A [ 2671 ] Q^U A proportion will be (by 4. 6) BR : R K ::BA (the diltance of ihe Ititions to bemealured with a chain) : A F, the di.ftance (ought. But if the index cut thereclined fide of the fquare, in the pointL; then the proportion is L S : S B :: B A :AG, the diltance fought ; which,…

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