HENRY CAREY BAIRD, Industrial Publisher, 406 Walnut St., PHILADELPHIA.

THE FIFTH GRAND STATE FAIR OF THE MECHANICS AND AGRICULTURAL STATE ASSOCIATION OF LOUISIANA

Scientific American, Volume XXIV., No. 12, March 18, 1871 — Part 90

Will be held on the Fair Grounds of the Association, in the city of New Orleans, commencing SATURDAY, APRIL 8, 1871, and continuing nine days. Exhibitors are invited from every section of America. Railroads, steamships, and other transportation lines, as named in the Premium Catalogues, will carry exhibitors and their wares to and from the Fair at one half the usual rates. For further information see Premium Catalogue, which will be sent to any address free of charge.

Scientific American, Volume XXIV., No. 12, March 18, 1871 — Part 90

LUTHER HOMES, Secretary and Treasurer, New Orleans, La.

Scientific American, Volume XXIV., No. 12, March 18, 1871 — Part 90

ROOT'S SAFETY BOILER. For Pamphlets with Price List and Testimonials, address ROOT STEAM ENGINE CO,, 2d Ave., cor. 28th st., N. Y. THE BEST IN THE MARKET.

_WIRE ROPE._ JOHN A. ROEBLING'S SONS, MANUFACTURERS, TRENTON, N. J.

For Inclined Planes, Standing Ship Rigging, Bridges, Ferries, Stays, or Guys on Derricks & Cranes, Tiller Ropes, Sash Cords of Copper and Iron, Lightning Conductors of Copper. Special attention given to hoisting rope of all kinds for Mines and Elevators. Apply for circular, giving price and other information. Send for pamphlet on Transmission of Power by Wire Ropes. A large stock constantly on hand at New York Warehouse, No. 117 Liberty street.

Made by one Agent, selling Silver's Broom. 100,000 in use. Recommended by Horace Greeley and _Am. Agriculturist_. One county for each Agent. _Prices Reduced_. C. A. CLEGG & CO., New York, or Chicago, Ill.

EMERSON'S PATENT MOVEABLE TOOTHED CIRCULAR SAWS]

And Perforated Circular and Long Saws. Also Solid Saws of all kinds. No. 1 Ferry St., cor. Gold street, New York. Branch Office for Pacific Coast, No. 606 Front street, San Francisco, Cal.

_MACHINE SCREWS,_ For all purposes, with square, round, and hexagon heads. A. W. GIFFORD & CO., Worcester, Mass.

The fact that this Shafting has 75 per cent greater strength, a finer finish, and is truer to gage, than any other in use, renders it undoubtedly the most economical. We are also the sole manufacturers of the CELEBRATED COLLINS PAT. COUPLING, and furnish Pulleys, Hangers, etc., of the most approved styles. Price Lists mailed on application to