Page:The Mathematical Principles of Natural Philosophy - 1729 - Volume 1.djvu/45

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THE

Mathematical

PRINCIPLES

OF

Natural Philoſophy.

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Definitions

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Def. I.

The Quantity of Matter is the meaſure of the ſame, arising from its denſity and bulk conjunctly.

HUS AIR of a double denſity, in a double ſpace, is quadruple in quantity; in a triple ſpace, ſextuple in quantity. The ſame thing is to be understood of ſnow, and fine duſt or powders, that are condenſed by compreſſion or liquefaction; and of all bodies that are by any cauſes