ng psychological study.—By T. D. Crothers, M.D. Contained in SCIENTIFIC AMERICAN Postal Order or Check. SUPPLEMENT, No. 474. Price 10 cents. To be had at Roofing, Building Felt, . MUNN & CO., Publishers, this office and from all newsdealers. The same number Steam Packings, Boiler Coverings,… … and described int JUPPUEMENT. cation of the SCIENTIFIC AMERICAN, continue to ex- Price for the § sEMENT for the United States and f Power. amine improvements, and to act as Solicitors of Patents ridges, Canada, $5.00 a yo r one copy of the SCIENTIFIC AM- - for Inventors. << 8, = “7 of the…
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