SA Supplements Vol 66 Issue 1717supp

SA Supplements

Volume 66, Issue 1717supp

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Features

A History of Electrical Theories

The Changes Which Discovery Have Wrought

P. Gruner

Rebuilding the Paris Telephone System

A Record-Breahing Performance

S. E. Brown

Experiments on the Constitution of the Electric Spark

The World's Wine Crop

The Problem of Gas Propulsion

Stamp-Vending Machines

The Construction of an Automatic German Device. By Our Berlin Correspondent.

Can Precious Stones be Manufactured?

The Chemistry of Gems

Stanley C. Bailey

Pasteur and Bacteriology

The Passing of the Whale

Catgut for Surgery

How it is Manufactured

Lodging Conditions in Paris and other French Cities

The Ascent of Sap in Plants

A New And Ingenious Theory

Gustav Glock

The use of African Elephants for Transport Service

The Kuch Quartz Mercury Vapor Lamp

What the Substitution of Quartz for Glass Means

O. Bechstein

A New Three-Color Camera

A 325-Horse-Power Kerosene Motor

the Engines Designed for the Italian Submarines. Our English Correspondent.

The New “Valveless” Motor

Remarkable Invention by Cowper-Coles

The Direct Production of Copper Tubes, Sheets, and Wire

Cæur D'alene District, Idaho

A $500 Prize for a Simple Explanation of the Fourth Dimension

Whither are we Drifting?

The Motion of the Solar System Through Space

J. C. Kapteyn

Sun Spots and Solar Temperature

Science Notes

Engineering Notes

Trade Notes and Formulæ