rtisement in another column. Agents wanted.

American Boiler Powder Co., Box 315, Pittsburgh, Pa., make the only
safe, sure, and cheap remedy for "Scaly Boilers." Orders solicited.

Belting that is Belting.--Always send for the Best Philadelphia
Oak-Tanned, to C. W. Arny, Manufacturer, 301 Cherry st., Phil'a.

E. Howard & Co., Boston, make the best Stem-winding Watch in the
country. Ask for it at all the dealers. Office 15 Maiden Lane, N. Y.

For mining, wrecking, pumping, drainage, and irrigating machinery, see
advertisement of Andrews' Patents in another column.

The best place to get Working Models and parts is at T. B. Jeffery's,
160 South Water st., Chicago.

Brown's Coalyard Quarry & Contractors' Apparatus for hoisting and
conveying material by iron cable. W. D. Andrews & Bro, 414 Water st.,
N. Y.

Improved Foot Lathes. Many a reader of this paper has one of them.
Selling in all parts of the country, Canada, Europe, etc. Catalogue
free. N. H. Baldwin, Laconia, N. H.

Peteler Portable R. R. Co. contractors, graders. See adv'ment.

E. P. Peacock, Manufacturer of Cutting Dies, Press Work. Patent
Articles in Metals, etc. 55 Franklin st., Chicago.

Peck's Patent Drop Press. Milo Peck & Co., New Haven, Ct.

Millstone Dressing Diamond Machine--Simple, effective, durable. For
description of the above see Scientific American, Nov. 27th, 1869.
Also, Glazier's Diamonds. John Dickinson, 64 Nassau st., N. Y.

Steel name stamps, figures, etc. E. H. Payn, M'f'r, Burlington, Vt.

Cold Rolled-Shafting, piston rods, pump rods, Collins pat. double
compression couplings, manufactured by Jones & Laughlins, Pittsburgh,
Pa.

Keuffel & Esser 116 Fulton st., N. Y., the best place to get 1st-class
Drawing Materials, Swiss instruments, and Rubber Triangles and Curves.

For Solid Wrought-iron Beams, etc., see advertisement. Address Union
Iron Mills, Pittsburgh, Pa., for lithograph, etc.

For the best Self-regulating Windmill in the world, to pump water for
residences, farms, city buildings, drainage, and irrigation, address
Con. Windmill Co., 5 College Place, New York.

The Merriman Bolt Cutter--the best made. Send for circulars. H. B.
Brown & Co., Fair Haven, Conn.

Taft's Portable Hot Air, Vapor and Shower Bathing Apparatus. Address
Portable Bath Co., Sag Harbor, N. Y. (Send for Circular.)

Glynn's Anti-Incrustator for Steam Boilers--The only reliable
preventive. No foaming, and does not attack metals of boilers. Pric