ticable for the farmer to operate a still on a small —_———_——_—_s~+ oo The offer by the Scisntiric AMERICAN of an aero- Artificial Sapphires. scale under present conditions. Moreover, the still plane trophy has caused much interest in Europe—so can only be shut down by an internal revenue officer.… … has followed the example and offers a cup for aero- small still in a desultory manner. The still must be was made recently by Prof. Alfred J. Moses, of Colum- constructed as prescribed by law and the process con- planes. The idea is a simultaneous race, and the ma- bia University. He states that…
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