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INVENTORS, MANUFACTURERS, AND FMMERS. THIRTEENTH YEAS! prospectus of the SCIENTIFICJIMERICAN. This work differs materially from other publications, being an Illustrated Periodical, devoted to the promulgation of information relating to the various Meohani-oal and Chjbimioal Aets, Manufaotuebs, AaaiouLTraB, Patents, Inventions, ENaiNKEBma, Mill Woek, and all interests which the light of Pkagtioal Soiknok is calculated to advance. Every number of the SCIENTIFIC AMERICAN contains eight pages of reading matter, abundantly illustrated with from five to eight ENaEAViNGB—all of which are expressly engraved for this publiQation. All the most valuable patented discoveries are delineated and described in its issues, so that, as respects inventions, it may be justly regarded as an Illuatrated Repertoryy where the inventor may learn what has been done before him in the same field which he is exploring and where he may bring to the world a knowledge of his own achievements. Mechanics, Inventors, Engineers, Chemists, Manufacturers, Agriculturists, and people in every profession of life, will find the SCIENTIFIC AMERICAN to be of great value in their respective callings. Its counsels and suggestions will save them hundreds of dollar annually, besides affording them a continual source of knowledge, the value of which is beyond pecuniary estimate. Much might be added to this Prospectus, to prove that the Soikntipio Ameeioan is a publication which every Inventor, Mechanic, Artisan, and Engineer In the United States should patronize; but the publica-bion is so thoroughly known throughout the country bhat we refrain from occupying further space. TERMS OF SUBSCRIPTION-Two Dollars a Year, or One Dollar for Six Months. CLUB RATES. Five Copies, for Six Months.................$4 Ten Copies, for Six Months.................$S Ten Copies, for Twelve Months...........Si5 Fifteen Copies, for Twelve Months........33 Twenty Copies, for Twelve Months.......$38 For all clubs of Twenty and over, the yearly sub scription is only $1 40. Specimen copies will be sen gratis to any part of the country. Scientific American, Inc., Publishers and Patent Agents, No. 128 Fulton street. New York.

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