A new Volume of the SCIENTIFIC AMEEICAN commences about the middle of September in each year. It is ajouroal of Scientific, Mechanical, and other improvements; the advocate of industry mall its various branches. It is published weekly in a form suitable for binding, and constitutor, 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 amonnt of practical information concerning the progress of in-vontionand discovery throughout the world The Scientific American Is themost widely circulated and popular journal ef 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 Agents, as we are uot in the habit of furnishing certificates of agency to any Letters should be directed (post-paid) to MUNN* CO., (26 Fulton street, New Ton Terms I Terms I Terms ! One copy, for One Teal $3 " Six Months $1 Five copies, forSix Months $4 Ten Copies fol Six Months f01 $9 Ten Copies for Twelve Monthi, $15 fifteen Cdpiesfor Twelve Months,* $33 Twenty Copies for Twelve Months, $38 Southern and Western Money taken at par b inbMrlptioni, or Port Offioa Stamp* takan at ik*f full value.