A new Volume of tbe SCIENTIFIC AMERICAN ommeuces about tho middle of September in each ear. It is a journal of Scientific, Mechanical, and ther improvementR.; the ad'vocate of industry in all its variouw branches. It is published weekly jn a orm suitable for binding, and constitutes, at the end f each year, a splendid volume of over 400 pages, with a copious index, and from flye to six hundred riginal engravings, together with a great amount of practical information concerning the progress ef in-vontion and discovery throughout the world. The Scientific American is the most widely circulaR ed and popular journal of tbe kind now published Its Editors, Contributors, aud Correspondents are mong ,the ablest practical ecientific men in the world, The Patent Claims are pnbJisbed weekly and are nvaluable to Inventors and Patentees, We particularly warn the public against paying money to Travelling Agents, as we are not in the abit 0r furnishing certificates of agency to any no. Letter. should he directed (post-paid) to MUNN& 00" 128 Fultonstreet,New yu.k. Terms! Terms! Terms! One copy, for One Year $2 " Six Month. $1 Five copies, for Six Month. M Ten Copi.s for Six Montbs fOJ $8 Ten Copies for Twelve Months, $10 fifteen Copies for Twelve Month., $22 Twenty Oopies for Twelve Month., $28 Southeq' &nd Western Mone-y taken at par for bscriptibns, or Post Office Stamps taken at their all Mine.