BOGARDUS' PATENT UNIVERSAL ECCENTRIC MILLS--For grinding Bones, Ores, Sand, Old Crucibles, Fire Clay, Guanos, Oil Cake, Feed, Corn, Corn and Cob, Tobacco, Snuff, Sugar, Salts, Roots, Spices, Coffee, Cocoanut, Flaxseed, Asbestos, Mica, etc., and whatever cannot be ground by other mills. Also for Paints, Printers' Inks, Paste Blacking, etc. JOHN W. THOMSON, successor to JAMES BOGARDUS, corner of White and Elm Sts. New York. * * * * * _WORKING MODELS_ And Experimental Machinery, Metal or Wood, made to order by J.F. WERNER, 62 Center St., N.Y. * * * * * EAGLE FOOT LATHES, [Illustration: Eagle Foot Lathe] With Scroll and Circular Saw Attachments, Slide Rest, Tools, &c.; also Small Engine Lathes, Metal Hand Planers, &c. Neatest designs, superior finish. LOW PRICES. Our new Catalogue describes these and every tool necessary for the Amateur or Artisan. Send for it. WM. L. CHASE & CO., 95 & 97 Liberty St. New York. * * * * * PYROMETERS For showing heat of Ovens, Hot Blast Pipes, Boiler Flues, Super-Heated Steam, Oil Stills, &c. HENRY W. BULKLEY. Sole Manufacturer, 149 Broadway, New York. * * * * * PROSPECTUS OF THE SCIENTIFIC AMERICAN For 1877, THE MOST POPULAR SCIENTIFIC PAPER IN THE WORLD. ---- THIRTY-SECOND YEAR. ---- VOLUME XXXVI.--NEW SERIES. ---- The publishers of the SCIENTIFIC AMERICAN beg to announce that on the sixth day of January, 1877, a new volume was commenced. It will continue to be the aim of the publishers to render the contents of the new volume more attractive and useful than any of its predecessors. _To the Mechanic and Manufacturer._ No person engaged in any of the mechanical pursuits should think of doing without the SCIENTIFIC AMERICAN. Every number contains from six to ten engravings of new machines and inventions which cannot be found in any other publication. TERMS OF SUBSCRIPTION. One copy of the SCIENTIFIC AMERICAN will be sent for _one year_, 52 numbers, POSTAGE PREPAID, to any subscriber in the United States or Canada, on receipt of _three dollars and twenty cents_ by the publishers. _One extra copy_ of the SCIENTIFIC AMERICAN will be supplied gratis _for every club of five subscribers_ at $3.20 each; or six copies for $16.50 without extra copy. Postage free. THE SCIENTIFIC AMERICAN SUPPLEMENT. A weekly paper, uniform in size with the SCIENTIFIC AMERICAN, but a distinct publication. It contains working drawings of engineering works, and elaborate treatises on every branch of Science and Mechanics, by eminent writers, at home and abroad. An illustrated cover protects the handsomely printed sheets. Price, $5.00 per annum. Single copies 10 cents. _One copy of the_ SCIENTIFIC AMERICAN _and one copy of the_ SCIENTIFIC AMERICAN SUPPLEMENT will be sent for one year, postage prepaid, to any subscriber in the United States or Canada, on receipt of _seven Dollars_ by the publishers.