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 936
being rectified to the winterelciptic. 10. Sinical quadrant (pi. CCXXITI. fig.4.) confifts of feveral concentric quadran-tal arches, divided into eight equal paitsby radii, with parallel right lints erodingeach other at right angles.Now any one of the arches, as B C. mayreprefent a quadrant of any… … .X/••//ey-i -f Q^U A [ 2669 ] QUA horizon or meridian. If then BC betaken for a quadrant of the horizon, ei-ther of the fides, as AB, may reprefentthe meridian 5 and the other fide, AC,will reprefent a parallel, or line of eaftand welt: and ail the other lines, pa-rallel to AB, will alto be…
Art · Science
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