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Features

The Columbia Bicycle

A Novel Boat Rig

By H. R. Taylor

Coal-Cutting Machine for Manual Power

Railway Notes

The St. Gothard Tunnel

Geodetic Surveys

By L. M. Haupt

Hints on Building Chimneys

Oliver Evans' Model Mill of 1788

Alum in Baking Powders

Preece's Improvements in Telephones

Ceresin

Edison's Recent Telephonic Inventions

A New form of Transmitting Telephone

The Watch Telephone

Some Modifications of the Microphone and Telephone

By Geo. M. Hopkins

A Report on underground Telegraph Wires

A Simple Microphone

New Stethoscopic Microphone

Improved Musical Condenser

The Conditions of Health in the Infant

By Wm. B. Atkinson

Malaria Not of Vegetable Origin

By John S. Hittell

Mortality in the Principal Cities of the World

Glycerine Cement

Suicide in France

Dyspepsia from Impaired Movements of Stomach

Relations of Syphilis to the Public Health

Poisonous Tin Plate

Caustic Alcohol

(Sodium Alcohol And Potassium Alcohol.)

By Albert B. Prescott

New Blue on Flannel

The Origin of Temporary and Variable Stars

Dyes for Wool to Stand Milling

Artificial Coloring Matters

Blasting Gelatine

Solid Shades for Wool

The Light from Venus and Mercury

Gulf Weed

The Chinese Almanac

Mural Fountain in Majolica

By C. Lacher and FR. Wudia

Alfalfa

“Loco” Poisons of the West

Raising Ducks

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    February 15, 1879

    Confronting Common Wisdom