40 For all clubs of Twenty and over the yearly subscription is only $2 00. Names can be sent in at dillM ent times and from different Post-ofilees. Specimen copies will be sent gratis to any part of the country. Western and Canadian money or Post-nflicc stamps taken at par for subscriptiom Canadian subscribers will please to remit 25 cents extra on each year's subscription to pre-pay postage. Park Row New York. OR. PATENT FRICTIONAL CLUTCH. 1863 SCIENTIFIC AMERICAN INC., 1863-02-21
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