A new Volume of the SCIENTIFIC AMERICAN commences About the middle of September in(eacb year. It is a journal of Scientific, Mechanical, and other improvements; the advocate of industry in all its various branches. It is published weekly in a form suitable for binding, and constitutes, at the end of each year, a splendid volume of over 400 pages, with a copious index, and from five to six hundred original engravings, together with a great amount of practical information concerning the progress of in-vontionand discovery throughout the world. The Scientific American is the most widely circulated and popular journal of the kind now published. Its Editors, Contributors, and Correspondents are among the ablest practical scientific men in the world. The Patent Claims are published weekly and are invaluable to Inventors and Patentees. We particularly warn the public against paying money to Travelling AgeHts, as we are not in the habit of furnishing certificates of agency to any oua. Letters should be directed (post-paid) to MTTNN CO., 128 Fulton street, New Yoik. Terms ! Terms! Terms ! One copy, for One Tear $S " Six Months $1 Five copies, for Six Months $4 ..Ten Copies for Six Months for $8 " Ten Copies for Twelve Months, $16 Fifteen Copies for Twelve Months, 22 Twenty Copies for Twelve Months, $28 Southern and Western Money taken at par for ubscriptions, or Post Offloe Stamps taken at their full valve.