SA Supplements Vol 77 Issue 1995supp

SA Supplements

Volume 77, Issue 1995supp

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Features

Petroleum and its Derivatives

The Origin and Industrial Treatment of Mineral Oil

David T. Day

The Oil-burning Steam Yacht “Cyprus”

Ocean Liner Principles Embodied in an Ocean-going Yacht

Prehistoric Mines in Belgium

Flint, the “Steel” of Prehistoric Man, Systematically Mined Underground

Our Present Physical Knowledge of X-Rays

A Synopsis of Their Most Important Properties

Wheeler P. Davey

Electric Iron Production on a Large Scale

The Use of Concrete in the Construction of Roads

A Recent Development With Much Promise for the Future

Charles E. Foote

A Simple Method of Counting Alpha and Beta Particles

Each Particle Registers Itself Automatically on a Photographic Record

H. Geiger

The Invention of Celluloid

L. H. Baekeland

The Manufacture and Uses of Blaugas

Compressed and Liquefied Oilgas for Transportation in Cylinders

Hugo Lieber

Automatic Stabilizers

Curbing the Mississippi

Spending $500, 000 to Prevent the River from Cutting Off Thirty Miles of Itself

James R. Crowe

Artificially Induced Pearl Production

H. Lyster Jameson

Quantitative Colorimetric Analysis—II

Its Theory, Laboratory Methods and Apparatus

G. A. Shook

Intensity of Hertzian Waves Varies According to the Weather