E.R. Willson 75
Salem, Mass.

Mattheus 27

OF

PHYSICAL MANIPULATION.

BY

EDWARD C. PICKERING,

Thayer Professor of Physics in the Massachusetts Institute of Technology

NEW YORK:
PUBLISHED BY HURD AND HOUGHTON.

Cambridge: The Riverside Press.

1873.

Entered according to Act of Congress in the year 1873, by
EDWARD C. PICKERING,

In the Office of the Librarian of Congress, Washington.

ΤΟ

Prof. Wm. B. Rogers,

THE FIRST TO PROPOSE A PHYSICAL LABORATORY,

THIS WORK IS MOST AFFECTIONATELY INSCRIBED

BY HIS

SINCERE FRIEND AND PUPIL,

THE AUTHOR.