SA Supplements Vol 67 Issue 1733supp

SA Supplements

Volume 67, Issue 1733supp

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Features

Degreasing Wool

A New Continuous Process

A Correction

New Alloys of Aluminium

Wire Nail Fallacies

Hints for Users and Manufacturers

Robert Grimshaw

Wireless Telephony.–II

Its History and Present Status

Reginald Fessenden

Safety Factors in Dams

San Francisco's Fire Service

A New and Efficient Service

David Paul

Submarine Experiments of the past

Some Medieval Fancies Recently Realized

Franz M. Feldhaus

The Crystallization of Water

A. E. H. Tutton

The Untilled Field of Chemistry

Thoughts on the Potential Energy of Matter

Arthur D. Little

Caoutchouc and Artificial Rubber

Dirigible Balloons

Theoretical Speculations

Heinrich Von Helmholtz

The Production of Copper in Japan

Airship Harbors

An Idea for Dirigible Balloon Inventors

F. W. Ilges

Testing Paper Materials

How to Trisect an Angle

Mechanical Solutions of an Old Problem

A. Aubry

A Simple Metric Conversion Table

Changing Metric Units Into English Equivalents

Walter T. Swingle

Carbon Tetrachloride

Trade Notes and Formulæ

Electrical Notes

Engineering Notes