San Francisco, Calif. : Architect and Engineer Co · leaf 50
pro])()rtion of onepart oxvgen to four parts of nitrogen. Carbonic acid gas, the result of allcoml)Ustion. either slow or ra])id, exists in the very small ])roportion of threeto four parts in ten thousand of air, while the acpieous vapor varies greatlywith the temi)erature and exposure to water. In… … Loni^ Rt-ach School IIuHsr I. Lrr Button Anhitect C-33:J ■^ r\ \
Architecture · Building
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