This page has been validated.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Principia_-_1729_-_Definitions_-_Banner.png/450px-Principia_-_1729_-_Definitions_-_Banner.png)
THE
Mathematical
PRINCIPLES
OF
Natural Philoſophy.
Definitions
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