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Scientific American, Vol. 42, No. 21 (1880) (1880)
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out packing, rubber, or other water trap, he further conciudes, stops entirely the passage Our front page illustration represents a nest of four boil- perishable substance. of all germs and.particles from the air of the soil pipe,-in- ers. of the Babcock’& Wilcox: type. These. boilers’.were The… … _THE STANDARD ‘OIL © 1880 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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