a lecture delivered before the Philadelphia College of Pharmacy.
--By SAML.P. SADTLER.

II. ENGINEERING AND MECHANICS.--Apparatus for Extracting
Starch from Potatoes.--With engraving.

A Simple Apparatus for describing Ellipses.--By Prof. E.J.
HALLOCK. 1 figure.

A Novel Propeller Engine.--With full description and numerous
engravings.--By Prof. MACCORD.

The New Russian Torpedo Boat, the Poti.--With engraving.

A New Steamer Propelled by Hydraulic Reaction--Figures showing
plan and side views of the steamer.

A New Form of Flexible Band Dynamometer.--By Prof. W.C.
UNWIN. 4 figures.

III. TECHNOLOGY.--Enlarging on Argentic Paper and Opals.--By
A. GOODALL.

The Manufacture and Characteristics of Photographic Lenses.

Improved Developers for Gelatine Plates.--By DR. EDER.

The Preparation of Lard for Use in Pharmacy.--By Prof. REDWOOD.

Anti-Corrosion Paint.