P .-- Star and other brands PLATE GLASS, embracing three-quarters white: Crown and all other varieties.

We would call particular attention to our Black Glass, made expressly for Ambrotypes.
CHEMICALS, for the Daguerreotype and Photographic Art.
Iodized and Plain COLLODION.

Gun Cotton, etc., etc.
Tagliabue's Collodiometres and Actino-Hydrometres, for testing Chemicals.
APPARATUS OF EVERY VARIETY.
Gutta Percha, Porcelain, and Glassware of all kinds used in the Art.
A large assortment of Gilt Frames always on hand and made to order.
Ambrotype Shields, with solid corners of a new style.
All orders will meet with prompt attention SCOVILL MANUFACTURING CO., PARK BUILDING New York 36 Park Row, 4 Beckman, and 141 Nassau Street.
HARDWICH'S PHOTOGRAPHIC CHEMISTRY AMERICAN EDITION.
A MANUAL of PHOTOGRAPHIC CHEMISTRY, INCLUDING THE PRACTICE OF THE COLLODION PROCESS.
BY T.FREDERICK HARDWICH, LECTURER ON PHOTOGRAPHY IN KINGS COLLEGE, LONDON; LATE DEMONSTRATOR OF CHEMISTRY IN KING'S COLLEGE.
Last Edition, The above is the title of this new and valuable work.

It is too well known to need any further comment in this place.

This volume contains nearly 300 large duodecimo pages, bound in red cloth, $1.00.