KSHrv* .•^rO/j lEiiiii iiiiiilil r/^xn, 73?-<-^^ •xX* A WEEKLY JOURNAL OF PRACTICAL INFORMATION, ART, SCIENCE, MECHANICS, CHEMISTRY, AND MANUFACTURES. , $3 per Annum NEW YORK, SEPTEMBER 3, 1870. Vol. XVIII—NO, 10. 1 [IN ADVANCE.] [NEW SERIES.] … ) 1870 SCIENTIFIC AMERICAN, INC.
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