COMMUNICATIONS RECEIVED. [OFFICIAL. INDEX OF INVENTIONS Lettere Patent of the United States were Granted in the Week Ending September 26 1876 AND EACH BEARING THAT DATE. SCIOIDIJLE OF PATENT FEES. $10 623 $15 $20 $10 $20 $30 $10 $10 $15 $30 TEE VALIDITY OF PATENTS. Adurtionntuto. Opticians 994 Chestnut St. Philadelphia Pa. CHLORIDE OF CALCIUM. Scientific Farmer. Price $1.00 a year. SCIENTIFIC FARMER COMPANY 43 Chatham St. Boston Mass. ALLIS BULLARD & CO. Limited DO YOU agl-OWN PRINTING FAVORITE Self-i'k'g Press $16 GrOMMAM AL CO. BOSTON MASS. THREE THINGS IN ONE Pure Air and an Even Tempe rature throughout a Room. $100. REWARD. $100., scientific american, 1876-10-28
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