Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 485
ly increased pressure of thecornered air; and in order that the walls maynot give, he backs these u]) by adding a somewhatlower pressure in the neighboring compartments 904 PRACl-ICAT, MECHANICS FOR BOYS [Aug., —the intervening bulkheads and deck having toresist nothing greater than the moderate… … THK u. s. ckli>i:k .Mirni c.iKoijyyi, -vnv. first siiir EXPF.RIMF.NTAI.I.Y WITH TIIIC SF,I,F-,SA I, VINC the other side of the door. Naturally, you won-der why this has not been done before —so domany engineers and technical men; but it is an-other example of how we overlook many goodthings…
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