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Features

The Use of Machine Guns in the Field, in Combination with Infantry

War Balloons

Sustaining Walls

Torpedo Boat Catchers

Employment of Acetic or Formic Acid in Bleaching

A New Thermometer

Fleuriais' Gyroscope Collimator

La Nature

Tea Withering Apparatus

A New Gas Thermo-Regulator

The Lactocrite

A New Method of Ascertaining the Amount of Fat in Milk

By H. Faber

Electrical Welding

The Electric Waltzers

Orthochromatic Photography

By J. B. B. Wellington

Phosphorescence of Alumina

By Edmond Becquerel

The Capillarity and Density of Liquids

Separation of Nickel by the Magnet

By Thomas T. P. Bruce Warren

Sulphurous Acid in the Chemical Industries

The Morphological Causes of Heredity

A Floating Hospital

Astronomical Telescopes: Their Object Glasses and Reflectors

By G. D. Hiscox

Popular Errors in Meteorology

By Cleveland Abbe

The Third Eye of Reptiles

An Epidemic of Micrococcus Prodigiosus

By M. Grimbert

Beethoven's Portrait

The Sinaloa Colony

Dwarfs and Giants

Departments

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February 26, 1887

Confronting Common Wisdom