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Street Elevator at Stockholm


Vogel's Valves for Pulsometers

Protection from Fires in Theaters

D'Arsonval's Multiple Gas Burners

Submarine Explorations

A Good Intensifier for Gelatine Plates

Ramie—A Recent Industry

Apparatus for the Manufacture of Carbonate of Strontium

The Crystallization of Phosphoric Acid

By P. L. Huskisson

Mont Dore, West Kirby, Cheshire

Atomation of Oxygen at Elevated Temperatures, and the Production of Hydrogen Peroxide and Ammonium Nitrite, and the Non–Isolation of Ozone in the Burning of Purified Hydrogen and Hydrocarbons in Purified Air

By Albert R. Leeds

Incubators for Infants

Croton Oil

Recent Progress in Dynamo Electric Machines

By Silvanus P. Thompson

The Honey Ants of the Garden of the Gods

The Indians of New Mexico

Composition of Manure

Culture of Raspberries


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April 26, 1884

20% Sitewide for President's Day