Institute of Mining Engineers.

Lifting a 40-inch Water Main.--With engraving.

The Inter-oceanic Canal Question.

The Mersey Tunnel.

Improved Revolver.--With 4 figures.

Motors for Street Railways.--Results of experiments on mechanical
motors for tramways made by the jury on railway appliances
at the Antwerp Exhibition.--By Capt. DOUGLAS GALTON.


III. TECHNOLOGY.--Alizarine Dyes.--Process of dyeing.--Recipes for
various colors.

Cement Paving.--Composition made by the Wilkes' Metallic
Flooring Company.--Other compositions.

A New Bleaching Process.--The "Mather-Thompson" system.

Instruments for Drawing Curves.--By Prof. C.W. MACCORD--1.
The Hyperbola--2 figures.

Experiments with Fibers.--By Dr. THOS. TAYLOR.--Detection of
Fraud.--Method employed.--Cotton mixed with linen.--Experiments
with flax.--Wool tested with acid.--Tests of dyed black silk.