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Scientific American, Vol. 82, No. 10 (March 1900) (1900)

leaf 12

An illustration from Scientific American, Vol. 82, No. 10 (March 1900), 1900, leaf 12
0 cents.For sale by Munn & Co., Sni Broadway, New York City,or by any bookseller or newsdealer TME Berkefeld Filter gives a continuous flow of purewater in large or small quantities. TheU(TjUmlflr is made of Infusorial Earth,li which retains all minute germs and impu-[Jrities. The cylinder can… … Klectnc circuits, resistance switch for, Holmes & Broadbent Klectrtc compressors, automatic controller for, N. A. Cbristensen Electric contact apparatus, C. (i. O. H. von Kohler Klectrtc machines, means f»r regulating, W. H. Cooley Electric meter, G. Hook ham , Electric recuperator, Hutin &…

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