Features

Silvering Glass

The Catamaran, or Double-Hulled Sail-Boat

Three-Throw Pumps

Economy in Steam

Mechanical Appliances for Mine Accidents

Mr. Ruskin's Aphorisms on Drawing

Lessons in Mechanical Drawing

Hardening and Tempering of Steel

Lifting a Railway Station

A Ten-Inch Gauge Railroad

Notes on the Botany of the Rocky Mountains

Human Stature

Leyden Jar Discharge

Experiments with Atmospheric Electricity

Watch Oils

Rapid Filtering

Testing Wool

Oil of Turpentine, Rosin and Turpentine

Removal of Strong Odors from the Hands

Ingenious Method of Weighting Woolen Cloth

The Silk Industry in Europe

Coating Plates of Metal

On the Action of Various Fatty Oils upon Copper.*

Wool Greasing

On the Protection from Atmospheric Action Which is Imparted to Metals by a Coating of Certain of their own Oxides Respectively

Wool and Rag Cleansing

Action of Cyanogen on Albumin

Detection of Fatty Matters Fraudulently Introduced into Butter

Freezing Point of Ether

Presence of Benzene in Coal-Gas

A New Series of Acid Salts

Experiments Relative to the Formation of Ultramarine

Metanethol Camphor

Zinc in Animals and Plants

Cheap Greenhouses

Labor-Saving Cows

Estimation of Piperine in Pepper

Hop Culture in New York

Coloring Matter of the Petals of Rosa Gallica

Winter Coloring of Leaves

Influence of Cold on Milk

Detection of Alum in Flour

Extraction of Caffeine

Saccharifying Ferments

To Destroy Chicken Lice

A Suggestion for Winter Strawberries

Cost of Raising Potatoes

Judd vs. Alberoni

Scientific American Chess Record

Problem Tournaments for 78

Solutions to Problems

Rev. L. W. Mudge, Princeton, N. J.

The Hartford Globe Problem Tournament

Departments

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Complex Causes. Alternative Solutions.