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SA Supplements Vol 47 Issue 1209supp

SA Supplements

Volume 47, Issue 1209supp

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Features

Progress of Experiments with Kites in 1897-98 at Blue Hill Observatory

S. P. Fergusson

The Yucca Plant in Venezuela

Tobacco in Korea

From Djibouti to Harrar

Portable Hand-Punching and Shearing Machines

The “Ballot” Shaft Coupling and Propeller

Memorandum on the Mineral Resources of the Philippine Islands

George F. Becker

Artificial Silk in Germany

Miscellaneous Notes

Selected Formulæ

Engineering Notes

The Toy-Industry of Nuremberg

Siberian Silhouettes

Apparatus for Nickel Plating Numerous Small Objects at a Time

A new Acetylene Lamp

Heating by Coal Tar

The Economic Status of Insects as a Class

The Bad Language of Wild Birds

Charles A. Witchell

Portable Electric Propeller for Boats

Repairing a Screw Shaft

Departments

Patents - March 4, 1899