Manufacturers and Inventors A new Volume of the SCIENTIFIC AMERICAN commencesaboutthe middle of September in each year. It Is ajournalof Scientific, Mechanical, atd other improvements; the advocate of industry in all its various branches. It Is published weekly in a form suitable for binding, an4 constitutes, at the end ofeachjear, a splendid volume of over 400 pages, with a copious index, and from five to eii hundred original engravings, together with a great amount of practical information concerning the progrtss of invention and discovery throughout the world. The Scientific American is the moat widely circulated and popular je.urnal of the kind now published. Its Editors, Contributors, and Correspondent! ire amog the ablest practical scientific men in the wortd. The Patent Claims are published weekly and are Invaluable to Inventors and Patentees. PRIZES—We solicit attention to the splendid Prizes offered for the largest number of subscribers, consisting of a SILVER PITCHER worth (tfO ; a set of the ICO NOGRAPHIC ENCYCLOPEDIA worth $35 I DEMPSEY'S MACHINERY OP THE NINETEENTH CENTURV.andC. B Stuart's great work upon the NAVAL DRY DOCKS OP THE UNITED STATES. Letters shouldbe directed (post-paid) to MFNNfc CO, 123 Pulton street, New York. Terms ! Terms I Terms ! One copy, for One Year fa " Gil Months $1 Five copies, forSix Months $1 Ten Copies for Six Months for IS TenCoplesIor Twelve Months, 116" '.sSifteen Coplesfor Twelve Months, $12 Twenty Copies for Twelve Months, $18 Southern End Western Money taken at par fo rabsoriptlona, or Post Office Stampa tsken at their ; full value.