PLATES

ILLUSTRATING A NEW EDITION

OF

FERGUSON'S LECTURES

ON

MECHANICS, HYDROSTATICS, HYDRAULICS, PNEUMATICS,
OPTICS, GEOGRAPHY, ASTRONOMY, AND DIALLING.

EDITED AND ENLARGED

BY DAVID BREWSTER, A. M.

THIS AMERICAN EDITION, CAREFULLY REVISED AND CORRECTED

BY ROBERT PATTERSON,

PROFESSOR OF MATHEMATICS, AND TEACHER OF NATURAL PHILOSOPHY, IN THE
UNIVERSITY OF PENNSYLVANIA,

PHILADELPHIA:

PRINTED FOR AND PUBLISHED BY M. CAREY,

NO. 121, CHESNUT STREET.

1814.