SA Supplements Vol 66 Issue 1707supp

SA Supplements

Volume 66, Issue 1707supp

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Features

A New Departure in Ship Construction

By the English Correspondent of Scientific American

Wreck Statistics for 1907

American Power Transmission

A Review of Recent Work

Louis Bell

Electrical Vision at a Distance

The Armengaud System

A. Troller

Making Blue-Prints without a Frame

C. A. Burnap

A New Method of Plating Metals with Tin, Zinc, and Lead

An Air-Driven Typewriter

A Labor-Saving Office Device by our Berlin Correspondent

Dredging on the Panama Canal

A Description of the Machines Used

F. B. Maltby

Why Concrete should be Waterproofed

An Automobile Road Roller

A New French Type by our Paris Correspondent

Old and New Methods of Tempering Steel

A 100-Horse-Power Motor Yacht

A Gasoline Cruising Boat by our English Correspondent

The Distribution of Coal and the Rate of its Consumption

The Liquefying of Helium

Prof. Onnes' Remarkable Achievement

Francis Hyndman

Liability of Various Trees to Lightning Stroke

The Swastika

The History of a Popular Symbol

Charles De Wolfe Brower

Barley and its Cultivation

A few Popular Scientific Suggestions

D. Finlayson

The Practical Good of Astronomy

Harold Jacoby

The Transplanting of Fish

What has been done by the Fish Commission

Hugh M. Smith

Cells Sensitive to Light made with Selenium Vapor

Engineering Notes

Trade Notes and Formulæ