y, New Yorli. PLEMENT. No. 943. Price 10 cents. ‘I'o be had at this Price for the SUPPLEMENT. for the United States, Office and from all newsdeulers. Cauada, and Mexico, $5.00 a year; or one copy of the Seventeenth Edition of GASOLINE SCIENTIFIC AMERICAN and one copy of the SUPPLE- SWELL DRILLS… … of the SCIENTIFIC AMERICAN, with which is incor- undiscovered constituent in the air. Proof of the pres- ROBERT POOLE-& SON CO. porated “LA AMERICA CIENTIFICA E INDUSTRIAL,” ence of argon in the air by atmolysis. Separation of argon on a large scale. Density, spectrum and behavior or Spanish…
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