FREDERICK WM. MILLS, F.R.M.S.,

AUTHOR OF

“The Art and Practice of Interior Photography,” “Photography for Architects,” “Photography applied to the Microscope,” “An Introduction to the Study of the Diatomaceæ,” &c.

ILLUSTRATED.

DEMY 8vo., 1s. NET. CLOTH, 1s. 6d. NET.

Postage 2d.

With Exposure and other Tables.

BY

FREDERICK WM. MILLS, F.R.M.S.