SA Supplements Vol 68 Issue 1764supp

SA Supplements

Volume 68, Issue 1764supp

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Features

Iron and Steel

Their Relation to other Industries

F. W. Harbord

Letters Registered more than Two Thousand Years Ago

Standard Clocks Operated by Wireless

Vienna's Solution of an Interesting Problem

Alfred Gradenwitz

The Scrap Heap

The Internal-Combustion Engine.—III

Recent Improvements

H. E. Wimperis

A Practical Telephone

Suggestions for the use of a Home-Made Telephone

Fred W. Lane

An Armored Concrete Viaduct

Rotterdam's Remarkable Grade Crossings

C. Van Langendouck

Utilization of the Methane from Coal Seams

The Forests of the Philippines

The True Function of Birds

Emil Christian Hansen—1842-1909

Discoverer of the Principle of the Pure Culture in Fermentation Industries

J. Christian Bay

Crystal Architecture

Its Seven Styles

A. E. H. Tutton

Marine Plankton

The Biological History and Importance of Microscopic Marine Life

Emile Gadeceau

Domestic Dogs that have become Wild

Trade Notes and Formulæ

Engineering Notes

Electrical Notes