Chapter II: TECHNOLOGY AND CHEMISTRY.--The Reproduction and Multiplication of

Negatives. By ERNEST EDWARDS.

A New Method of Making Gelatine Emulsion. By W. K. BURTON.

The Pottery and Porcelain Industries of Japan.

Crystallization Table.

The Principles of Hop Analysis. By Dr. G. O. CECH.

Water Gas.--A description of apparatus for producing cheap gas, and
some notes on the economical effects of using such gas with gas
motors, etc.--By J. EMERSON DOWSON.

On the Fluid Density of Certain Metals. By Professors CHANDLER ROBERTS
and T. WRIGLESON.