The First Three Sections of Newton's Principia: With an Appendix, and the Ninth and Eleventh Sections (Classic Reprint)

Excerpt from The First Three Sections of Newton's Principia: With an Appendix, and the Ninth and Eleventh Sections

This is also confirmed by experiments in tubes exhausted of air, in which a feather, a lump of lead, of gold, or of any other substance, are all found to occupy equal times in falling through equal spaces. The motion produced by gravity in every part of each body being thus seen to be the same, it follows that the whole quantity of motion which gravity produces or tends to produce in each - in other words, the weight is proportional to the quantity of matter.

Note 2. The quantity of matter, or mass, of a body, is denoted by the symbol M.

Note 3. The density of a body may be defined as the quan tity of matter it contains in a unit of volume.

About the Publisher

Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com

This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.