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 122

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 122 — e below the point |or place E; and its velocity will be fomuch the greater as it tends to a pointnearer B, and flow-eft of all, when itmoves in the direction of the tangentED. See the articleFLUiD.Hence it appears that the fource E of allrivers and ltreams muft be more than afemi-diameter of the… … •/ /trrrlyj jat//i R I V [ 2795 ] R I V Ig 4000 miles nearly. Alfo the courfe(of all long rivers being in the direction[of the tangent at the point D, if theyrwere reprefinted by the tangent-line E G,then the height of the fource E above[the common furface of the earth at Bwould be eafily found.…

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