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 417

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 417 — ver be raifed by this meantinto a cittern, or cavity, to become thdfourre of fprings. , 3. The third hypothefis is that of the fa^gacious naturalift, Dr. Halley, who fup«ipoles the true fources of fpnrgs to bemelted (how, rain-water, dew, and va-Jpours condt-nfed. Now in order to prove, that the… … T J,/fm*> wft- S P R [ 304S ] S P R made the following experiment: he tooka veffel of water, made of the fame de-gree of faltnefs with that of the fea, bymeans of the hydrometer ; and havingplaced a thermometer in it, he broughtit, by means of a pan of coals, to thefame degree of heat with that…

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