SA Supplements Vol 87 Issue 2263supp

SA Supplements

Volume 87, Issue 2263supp

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Features

Rubber as a Colloid

Remarks upon the Chemical Structure of the Material in Various States

D. F. Twiss

Tests for Trainmen in Germany

Substitute for Rubber-Insulated Wires

The Shell Builders—I

A Brief Introduction to the Study of Conchology

R. W. Shufeldt

The Motor Fuel Problem

Electric Melting of Brass

Growing Hops in California

A Glimpse at an Industry That Will be Hit by Prohibition

Arthur L. Dahl

The Sir Robert Hadfield Prize

The Century Plant in Mexico

At Pompeii and St. Pierre

The Dynamic Heating of Air as a Cause of Hot Volcanic Blasts

George W. Cole

Direct Current vs. Power Factor

A Study in Inductance and What It means to the Engine

F. E. Austin

Vulcanisation of Rubber at Constant and Increasing Temperatures

German Mining Operations in Serbia

Influence of Aluminum Ions on Seed Germination

Experiments upon the Relation between Electric Conductibility and the Germination of Plants

Julius Stoklasa