K2^. ±^&m ■^^^^•^-^^^^^■^*^^ IHHHl wmmmm m£jSM& "O^* [Kntered 8t the Post Office of New York, N. V.. as Second Class Matter. Copyright. 1S9D. by Munn & Co.l A WEEKLY JOURNAL OF PRACTICAL INFORMATION, ART, SCIENCE, MECHANICS, CHEMISTRY, AND MANUFACTURES. $3.00 A YEAR. NEW YORK, MAY 27, 1899. Vol.… … NIAGARA AS AN INDUSTRIAL CENTER.—fSee page 343. J 11899 SCIENTIFIC AMERICAN, INC.
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