Chapter II: TECHNOLOGY AND CHEMISTRY--On some Recent Improvements

in Lead Processes. By NORMAN C. COOKSON

Apparatus Used in Berlin for the Preparation of Gelatine Plates.--
I. Mixing apparatus.--II. Digestive apparatus.--III. Triturating
apparatus--IV. Washing apparatus--3 figures

How To Make Emulsions In Hot Weather. By A. L. HENDERSON

The Distillation and Rectification of Alcohols by the Rational
Use of Low Temperatures. By RAOUL PICTET.--1 figure.--Pictet's
apparatus for the rectification of alcohol by cold

The Removal of Noxious Vapors from Roasting Furnace Gases

New Gas Exhauster. 1 figure

Advance in the Price of Glycerine

Analysis of Oils or Mixtures of Oils Used for Lubricating Purposes

Nitrate of Amyl