1,800 cubic inches ca- pumping wells. After- pacity and costing from 40 ward, in forms of magni- to 60 cents each. The use tude ranging from 5 to of oxygen in therapeutics 500 horse-power, it was was for that reason too extensively introduced into expensive, although a 35- manufacturing plants,… … particularly to the aero- to its illuminating prop- naut, to whom it is of im- erties. portance to know during Only one article is man- his ascensions how many ufactured from natural hours the supply of oxygen taken along will hold out. “Preussen,” 5,081 tons, built in 1902 for the Laeisz gas. That…
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