A

SYSTEM

OF

MECHANICAL PHILOSOPHY.

BY JOHN ROBISON, LL. D.

LATE PROFESSOR OF NATURAL PHILOSOPHY IN THE
UNIVERSITY OF EDINBURGH.

WITH NOTES,

BY DAVID BREWSTER, LL. D.

FELLOW OF THE ROYAL SOCIETY OF LONDON, AND SECRETARY TO THE
ROYAL SOCIETY OF EDINBURGH,

IN FOUR VOLUMES,

AND A VOLUME OF PLATES.

VOL. IV.

EDINBURGH:

PRINTED FOR JOHN MURRAY, LONDON.