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Facts and Fancy about Ventilation—I

Chemical Composition of the Air an Imperfect Criterion of Its Health Value

By Leonard Hill

Sir William Ramsay, K.C.B., F.R.S.

Famous for his Researches on Helium and the other rare gases of the Atmosphere

By W Ostwald

Ships with Corrugated Hull-Plating

Novelties at the laris Aviation Show

A Fine Exhibition Representative the Present Development of the Art

Schools for Tractioneers

Well Qualified Men in Great Demand

Microradiography

A New Application of X-rays

The Physical and Chemical Processes in Autogenous Cutting

By D A Stavenhaven

Sugar Beet Seed Growing in the United States

Good Crops Can Be Raised On American Soil

By C O Townsend

New Books, Etc.

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Scientific American Supplements Volume 74, Issue 1926supp

Think Outside the Gift Box