Manufacturers and Inventors A new Volume of the SCIENTIFIC AMERICAN commences bout the middle of September in each year. It is sjourna.l of Scie ntific, Mechanical, a n d other impl'ovements ; the advo cate of industry in all its various bran ches. It iF3 puhlished weekly in a form suitable [or biDding, and cODstitutes, at the end of each year, f.I. splendid l"olume of OV8r 4CO plI,g es, with a copious lode::, and from. five to six hundred original cn(;ravingfll together with 8. great amount of practical information concerning the progresR of invontion and diGcove,'y throughout the world. The Scientific American i. the most widely circulated Bud popular journal of the kind now published. Its Editors, Contributors, and Correspondent8 a.mong t.he .,h leat praeticRl scientiflo men in the world. The Patent Claim. are published weekly and are inva l uabl e to Inventors and Patentees. Wo particularly warn the public against payiug money to Travelling Agents, a s we are not in the habit of furni.hing certificate s of agency to any one. Letter. should be directed (post-paid) to MUNN k CO., 128 Fulton street, New Yorl. Terms Terms Terms One copy, for One Year $2 Six Month. $1 Five o opi e s , for Six Months $4 Ten Copie s for Six Month . for $8 Ten Copies for Tw:eIve Months, $ 16 lifteen Copies for Twelve Monthe, $22 Twenty Copies for Twelve Month., $28 Southern and Western Money taken at par for ubscriptions, or Post Omoe Stamp. taken at theb fal 1 nIue.