printing solutions.--Compound negatives.

Practical Directions for Making Lantern Transparencies.--By
T.N. ARMSTRONG.

Casting Chilled Car Wheels. 6 figures.


IV. ELECTRICITY, ETC.--Electricity and Prestidigitation.
2 figures.

Portable Electric Safety Lamp. 6 figures.

The Electric Discharge and Spark Photographed Directly without
an Objective. 6 engravings.


V. PHYSICS, ETC.--The True Constant of Gravity.

Origin of Thunder Storms.

Physics without Apparatus.--Manufacture of illuminating
gas.--Elasticity of bodies. 2 figures.

Scientific Amusements.--Dance of electrified puppets.--Silhouette
portraits. 2 figures.

A Sunshine Recorder. 2 figures.