ICE AND ICE HOUSES--HOW TO MAKE ice ponds; amount of ice required, etc., and full directions for building ice-house, with illustrated plan. Contained in Scientific American Supplement, No. 55. Price 10 cents. To be had at this office and of all newsdealers. * * * * * [Illustration] THE NEW TOY! Old Folks Tickled and Children Delighted Mechanical grasshopper, jumps 6 feet high. Samples free for 10 cents, 4 for 25 cents, 1 doz. for 50cts. By mail. Big Profit to Dealers. Agents Wanted. Valuable Catalogue of Agents Goods free. Address, WORLD M'F'G, CO. 122 Nassau St., New York. * * * * * 50 CHROMOS, name in new type, 10c. by mail. _40 Agts. Samples_, 10c. U. S. Card Co., Northford, Ct. * * * * * WANTED, BY THE SOUTHWARK FOUNDRY AND MACHINE CO., Philadelphia, a number of first-class fitters on engine work. * * * * * ICE-HOUSE AND COLD ROOM.--BY R. G. Hatfield. With directions for construction. Four engravings. Contained in Scientific American Supplement, 59. Price 10 cents. To be had at this office and of all newsdealers. * * * * * For Sale.--Engine for Steam Launch, at a bargain. Cylinder, 41/2 in. diameter, 5 in. stroke. For particulars, address JAMES T. MILLER, 119 Monroe St., Chicago, Ill. * * * * * [Illustration] Langdon Mitre Box Co, MILLERS FALLS MASS. Langdon and New Langdon Mitre Box. Send for Circular. * * * * * SCIENTIFIC AMERICAN SUPPLEMENT. Any desired back number of the Scientific American Supplement can be had at this office for 10 cents. Also to be had of newsdealers in all parts of the country. * * * * * THE OPEN FIREPLACE IN ALL AGES. By J. P. Putnam, Architect. One vol. 12mo. Price $2. With 269 illustrations of famous fireplaces of historical and artistic interest, together with original designs and suggestions for modern use. *** For sale by all Booksellers, or will be sent, postpaid, on receipt of price, by the Publishers, JAMES R. OSGOOD & CO., BOSTON. * * * * * STEAM PUMPS, THE NORWALK IRON WORKS CO., SOUTH NORWALK, CONN. * * * * * GREAT IMPROVEMENTS Recently made in CRUSHING AND GRINDING GOLD and SILVER ORES, BONES, PHOSPHATE ROCK, and CHEMICALS. We compel QUARTZ to grind QUARTZ. Address, for new circular, BAUGH & SONS, Philadelphia, Pa. * * * * * [Illustration] BEST FOOT LATHES, Back geared and screw cutting. Small Lathes, Hand Planers for Metal, Small Gear cutters, Slide Rests, Scroll and Circular Saw Machines. Lowest Prices. Send for illustrated catalogue. N. H. BALDWIN, Laconia, N. H. * * * * * MECHANIC WANTED.