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Unscientific Food Tests

The Fallacy of Testing Food Materials by Animal Inoculation

By W. T. Sedgwick

Food Preservatives, and the Sodium Benzoate Question

By J. H. Long

Solar and Lunar Halos

A Description of Principal Varieties Known to Science

By C. Fitzhugh Talman

Approaching the Limit of Increasing Gold Production

Is Our Standard of Currency Nearing Equilibrium?

Does Baking Sterilize Bread?, Weight of Trains

The Economics of Water Power

Fixed Charges on Hydraulic Plants Often Forbidding

The Effect of the Automobile on Railway Traffic

Selected Types of Modern Machinery

The International Exhibition of Engineering and Machinery at Olympia, London

A Rampart of Nations

How the Alps Rose from the Sea

The Physical Testing of Rock for Road Building—II

The Methods Used and the Results Obtained

By Albert T. Goldbeck and Frank H Jackson

Cosmical Problems

Their Influence on the Development of Spectrum Analysis

By Wolf-K*amp*ouml;nigstuhl

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    Scientific American Supplements Volume 74, Issue 1924supp

    Think Outside the Gift Box