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SA Supplements Vol 19 Issue 495supp

SA Supplements

Volume 19, Issue 495supp

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Features

Merchant Vessels as Armed Cruisers

Improved Steam Hammer

Torpedo Boats in War

Amateur Mechanics

Lens Making

Tempered Glass

Frederick Siemens

Purification of Water for Industrial Purposes

Rapid Smelting Plant

Liquefaction and Solidification of Formene and of Nitric Oxide

K. Olzewski

Suggestions in Art.—Theseus Conquering the Centaur

A. Canova

The Physics of Tenuity

A Recent Case of Hydatids

Notes on the Periodical Cicada

C. V. Riley

Grooved Bed for Gas Pipes