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 750
et the true amplitude or imuth be to the left hand of the obfervithus fuppofe the fun is really EbNthe time of obfervation, but the obfeifees him off the eaft point of the compand fo the true amplitude or azimutlthe left of the obierved : here it is Ident, that the E b N point of the copafs ought… … :/Tr -vr V A R |?eft. The fame will hold when the funis obfervcd on the weft-fide of the meri-dian. Suppofe the funs true amplitude at rifingis found to be E. 140, 20 N. but by theeompafs it isfound to be E. 260, 12N.Required the variation, and which wayit is. Since they are both the fame W3y,…
Art · Science
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