MACHINERY OF IMPROVED STYLES FOR making SHINGLES, HEADING and STAVES; also GUAGE LATHES for TURNING HANDLES. Sole makers of Law's Pat. Shingle and Heading Sawing Machine. Address TREVOR & CO., Lockport, N.Y. * * * * * CHLORIDE OF CALCIUM. FOR SALE VERY CHEAP. RANSOME, 10 Bush Street, San Francisco, Cal. * * * * * PERFECT NEWSPAPER FILE The Koch Patent File, for preserving newspapers, magazines, and pamphlets, has been recently improved and price reduced. Subscribers to the SCIENTIFIC AMERICAN and SCIENTIFIC AMERICAN SUPPLEMENT can be supplied for the low price of $1.50 by mail, or $1.25 at the office of this paper. Heavy board sides; inscription "SCIENTIFIC AMERICAN," in gilt. Necessary for every one who wishes to preserve the paper. Address MUNN & CO., Publishers SCIENTIFIC AMERICAN. * * * * * LECOUNT'S PATENT MACHINISTS' TOOLS. REDUCED PRICES. Set Iron Dogs, 3-8 to 2 in., $5.60 " " " 3-8 to 4 in., 12.00 " Steel " 3-8 to 2 in., 6.30 " " " 3-8 to 4 in., 13.00 Iron & Steel Clamps, Die Dogs, Clamp Dogs, Vice Clamps Expanding Mandrels, &c. Send for latest Price list to C.W. LE COUNT, South Norwalk, Conn. * * * * * BEST DAMPER REGULATORS AND LEVER GAUGE COCKS. MURRILL & KEIZER, 41 HOLLIDAY ST., BALTIMORE. * * * * * BRAYTON READY MOTOR It has no boiler, is safe, economical, started by any one in one minute, occupies small space, and gives an unsurpassed steady, reliable power. Address Penna Ready Motor Co., 20 N. 4TH ST PHILADELPHIA, PA. * * * * * THE TANITE CO., STROUDSBURG, PA. EMERY WHEELS AND GRINDERS. GEO. PLACE, 121 CHAMBERS ST., NEW YORK AGENT. * * * * * BOLT CUTTERS SCHLENKER'S NEW MACHINE REVOLVING-DIE. Send for Catalogue, giving prices and full description. HOWARD IRON WORKS, BUFFALO, N.Y. * * * * * STATE, COUNTY AND SHOP RIGHTS for sale of C. Koons' Patent Rat Trap; best out; caught 16 one night. Enclose stamp to owners and manufacturers, J.T. WILHIDE & BRO., York Road, Carroll Co., Md. * * * * * $5 TO $20 day at home. Samples worth $5 free. STINSON & Co., Portland, Me. * * * * * DUC'S IMPROVED PATENT ELEVATOR BUCKET, FOR BREWERS, FLOUR MILLS, GRAIN ELEVATORS, SUGAR REFINERS, &C. These buckets are made of the best charcoal stamping iron, and are warranted to outwear six of the "OLDSTYLE BUCKETS." The cost is about the same. Address T.F. ROWLAND, Brooklyn, E.D., N.Y. * * * * * $3 WATCHES. Cheapest in the known world. _Sample watch and outfit free to Agents._ For terms address COULTER & CO. Chicago. * * * * *