A new Volume of the SCIENTIFIC AMERICAN commences about the middle of September in each year. It is a journal of Scientific, Mechanical, and other improvements! th* 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 Eve to six hundred original engravings, together with a great amount of practical information concerning the progress of invention and diacoTery 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 Agents, as we are not in the habit of furnishing certificates of agency to any one. Letters should be directed (post-paid) to MTJNN CO., 128 Fulton street, New York. Terms ! Terms! Terms ! One copy, for One Year $3 " Six Months $1 Five copies, for Six Months $4 Ten Copies for Six Months foi (8 Ten Copies for Twelve Months, $15 fifteen Copies for Twelve Months, f22 Twenty Copiea for Twelve Months, 23 Southern and Western Money taken *t par (ot (nbsoriptiODS, oi Post Offios Stamp* Ucen at th*I* full value. j.