SA Supplements Vol 84 Issue 2186supp

SA Supplements

Volume 84, Issue 2186supp

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Features

The Belgian Congo

Facts Relating to its Economic Development

M. Horn

Differential Refractometer for Measuring the Salinity of Sea Water

The Autumn Moon

The Fairy Shrimps

The Beaver in Britain

Anomalies of the Animal World—V

Due to Artificial Selection and Breeding

R. W. Shufeldt

Chlorophyll in Animals

Chemical Method of Detecting Deterioration of Wool

Electro-Culture of Crops

A Review of Recent Developments

Junk is America's Richest War Bride

The Result of Amazing Wastefulness

James Anderson

The Different Methods of Preparing Rubber

The Relation of Chemistry and Mechanical Manipulation to the Evolution of the Glass Industry

Robert L. Frink

A New System of Gas-Firing

A. C. Ionides

Mediaeval Masons' Marks and Graffiti

How the Ancient Artisan Vouched for his Work

Designing and Constructing a Clock

A Simple Mechanism that Functions as Well as an Expensive Regulator

Guy H. Gardner

Screw Gages

The Human Factor in Railway Electrification

Making an Electric Locomotive Engineer out of a Steam Locomotive Engineer

W. F. Coors

Food Tests of Shark Varieties

Vulcanization Catalysts

Municipal School of Technology, Manchester

S. J. Peachy

New Books, Etc.