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SA Supplements Vol 61 Issue 1590supp

SA Supplements

Volume 61, Issue 1590supp

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Features

Rotary Converter Sub-Stations of the Long Island Railroad

Contemporary Electrical Science

Tinning

Gas Engines for Ship Propulsion

Canal Barge

J. E. Thoenyceoft

Canals: Ancient and Modern.—II

The Metals in Human Progress

Nelson P. Hulst

Foreign Commerce of United States

Gypsum-A much Misunderstood Material

Robert Grimshaw

The Mud-Skipper or Jumping Fish

Randolph I. Geare

Devices for Determining the Energy Losses in Iron Sheets

Alfred Gradenwitz

Control of the Direction of Electric Waves

William Marconi

White Cements

Engineering Notes

Primers and Fuzes for Cannon.—II

Ormond M. Lissak

Preliminary Report of the State Earthquake Investigation Commission

Trade Notes and Formulæ