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 1161

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 1161 — ft that they may beworked into any form. To harden themagain, lay them in (trong vinegar. Dio-fcorides (ays, that by boiling ivory forthe fpace of fix hours with the root ofmandragoras, it will become fo foft thatit may be managed as one pleafes.To /often and nubiten Ivory, take whitewine vinegar,… … ^%— I V o [ 1837 ] J U P [is boilinig hot, and it will foon becomefofter amd! much whiter than it was be-fore. Ivory may alfo be whitened andcleaned from fpotsin the following man-ner : laiy it in quick-lime and pour a lit-tle waten- over it, but not too much, thatthe heat; rmay not be too great,…

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