To ascertain where there will be a demand for new machinery or manufacturers supplies read Boston Commercial Bulletin's manufacturing news of the United States. Terms Z-i 00 a year. Wanted—Brick-making machine circulars. Box 6001, N. Y. In actual use—" Broughton's " Oil Cups and Lubricators have proved to be superior to any. Address, for circulars, II. Moore, 41 Center St., New York. Peck's patent drop press. Milo Peck Co., IN ew Haven, Ct. Back Nos., Vols., and Sets of Scientific American for sale. Address Thco. Tusch, No. 87 Park Row, New York. Mineral Collections—50 selected specimens, including gold and silver ores, $15. Orders executed on receipt of the amount. L.1, Feuchtwanger, Chemists, 55 Cedar St., New York. The Babcock Wilcox Steam Engine received the First Premium for the Most Perfect Automatic Expansion Valve Gear, at the late Exhibition of the American Institute. Babcock, Wilcox Co., 44 Cortt landt St.,New York. For best quality Gray Iron Small Castings, plain and fancy Apply to the Whitneyville Foundery, near New Haven, Conn. Keuffel Esser,71 Nassau st.,N.Y.,the best place to get lst-class Drawing Materials, Swiss Instruments, and Rubber Triangles and Carves Foot Lathes—E. P. Ryder's improved—220 Center st., N. Y. Those wanting latest improved Hub and Spoke Machinery, address Kettenring, Strong Lauster, Defiance, Ohio. For tinmans' tools, presses, etc., apply to Mays Bliss, Brook lyn, N. Y. Mill-stone dressing diamond machine, simple, effective, durable. Also, Glazier's diamonds. John Dickinson, H Nassau st., New York. Send for a circular on the uses of Soluble Glass, or Silicates of Soda and Potash. Manufactured by L. J. W. Feuchtwamger, Chemists and Drug Importers, 55 Cedar St., New York. Glynn's Anti-Incrustator for Steam Boiler—The only reliable preventative. No foaming,and does not attack metals of boiler. Libera! terms to Agents. C. D. Fredricks,587 Broadway, New York. Cold Rolled—Shafting,piston rods,pump rods,Collins pat.double compression couplings,manufactured by Jones Laughlins,Pittsburgh,Pa. For solid wrought-iron beams, etc., see advertisement. Addrosa Union Iron Mills;,Pittsburgh,Pa., for lithograph, etc. Machinists, boiler makers, tinners, and workers ot sheet metals read advertisement of the Parker Power Presses. Diamond carbon, formed into wedge or other shapes for pointing and edging tools or cutters for drilling and working stone, etc. Send stamp for circular. J ohn Dickinson, 64 Nassau St., New York. The paper that meets the eye of manufacturers throughout the United States—Boston Bulletin, $1-00 a year. Advertisements 17c.a line. Winans' boiler powder, 11 Wall St., N. Y., removes Incrusta Hons without injury or foaming ; 12 years in use. Beware of Imitations.