Every wheelwright and blacksmith should have one of Dinsmore's Tire Shrinkers. Send for circular to R.H. Allen & Co., Postoffice Box 376, New York.

For Small Engine Lathes, with foot-power, Hand Lathes, Bolt or Terret Cutters, Planers, etc., address W.E. Bradner & Co., Newark, N.J

Aneroid Barometers made to order, repaired, rated, for sale and exchange, by C. Grieshaber, 107 Clinton St., New York.

Foundery and Machine Business.--Experience with some capital, wants an engagement. South or West preferred. Address Box E.E., Catskill, N.Y.

Foreman in a Machine Shop--A person having ten years experience in that capacity is desirous of forming a new engagement. Address, with particulars, Postoffice Box 119, La Crosse, Wis.

Makers of Pipe Cutting and Tapping and Screwing Machines send circulars, without delay, to Forest City Pipe works, Cleveland, O.

For Best Spring-bed Bottoms address S.C. Jennings, Wautoma, Wis.

Parties having patents or patent goods to sell, send for The National, Buffalo, N.Y., $1 per year, 10c. single copy.

Back Nos., Vols., and Sets of Scientific American for sale. Address Theo. Tusch, No. 37 Park Row, New York.

Mineral Collections--50 selected specimens, including gold and silver ores, $15. Orders executed on receipt of the amount. L. & J Feuchtwanger, Chemists, 55 Cedar st., New York.