M. BAIRD & COMPANY, Broad and Hamilton Sts., PHILADELPHIA, PENN'A. Manufacture Locomotive Engines ESPECIALLY ADAPTED TO Every Variety of Railroad Service, And to the economical use of Wood, Coke, Bituminous and Anthracite Coal as Fuel. All Work accurately fitted to Gauges, and thoroughly interchangeable. Plan, Materials, Workmanship, Finish and M. Baird. Geo. Burnham. Efficiency fully guaranteed. JACOB NAYLOR, Successor to HUNSWORTH & NAYLOR, Peoples' Works, GIRARD AVE. AND FRONT STREET, PHILADELPHIA. STEAM ENGINES, BOILERS AND TANKS, Shafting and Gearing, Couplings, Pulleys and Hangers. Passenger and Freight Hoisting Machinery for Stores & Factories, Marble Sawing and Polishing Machinery of all Kinds, SPECIAL MACHINERY AND FIXTURES FOR SOAP MANUFACTURERS, Retorts, Meters, Stills, &c., for Chemists. Sugar Boilers, Tanks and Machinery. Castings in green sand or Loam, and Machinery in general. W. W. TUPPER & CO'S PATENT GRATES AND GRATE BARS. RIDER'S PATENT AUTOMATIC CUT-OFF ENGINE, either Vertical or Horizontal. URIAH A. BOYDEN, ESQ., of Boston, Mass., has deposited with the Franklin Institute the sum of one thousand dollars, to be awarded as a premium to "Any resident of North America who shall determine by experiment The following conditions have been established for the award of the premium: 1. Any resident of North America, or of the West India Islands, may be a competitor for the premium; the southern boundary of Mexico being considered as the southern limit of North America. 2. Each competitor must transmit to the Secretary of the Franklin Institute a memoir, describing in detail the apparatus, the mode of experimenting, and the results; and all memoirs received by him before the first day of January, one thousand eight hundred and seventy-three, will, as soon as possible after this date, be transmitted to the Committee of Judges. 3. The Board of Managers of the Franklin Institute shall, before the first day of January, one thousand eight hundred and seventy three, select three citizens of the United States, of competent scientific ability, to whom the memoir shall be referred; and the said Judges shall examine the memoirs, and report to the Franklin Institute whether, in their opinion, and, if so, which of their memoirs is worthy of the premium. And, on their report, the Franklin Institute shall decide whether the premium shall be awarded as recommended by the Judges. 4. Every memoir shall be anonymous, but shall contain some motto or sign. by which it can be recognized and designated, and shall be accompanied by a sealed envelope, endorsed on the outside with same motto or sign, and ¡containing the name and address of the author of the memoir. It shall be the duty of the Secretary of the Franklin Institute to keep these envelopes securely and unopened until the Judges shall have finished their examination; when, should the Judges be of opinion that any one of the memoirs is worthy of the premium, the corresponding envelope shall be opened, and the name of the author communicated to the Institute. 5. Should the Judges think proper, they may require the experiments described in any of the memoirs to be repeated in their presence. 6. The memoirs presented for the premium shall become the property of the Franklin Institute, and shall be published as it may direct. PAPER MANUFACTURERS AND AGENTS OF THE American Wood Paper Co., OFFICES AND WAREHOUSES: No. 27 NORTH SIXTH STREET, PHILADELPHIA, AND No. 128 WILLIAM STREET, NEW YORK. Have on hand and make to order, at short notice, NEWS AND BOOK PRINTING PAPER, ALL QUALITIES AND SIZES. Codorus Mill Writing Papers, MANILLA PAPERS. IMPORTERS OF CHEMICALS AND FELTINGS, DEALERS IN FAFER MAKERS MATERIALS, OF EVERY DESCRIPTION. Cash Market Prices Paid for all kinds of Paper Stock. One Large Octavo Volume. Price, $9.00. This Supplemental Volume to the original work comes down to the end of 1869, including additions and corrections in 1870 and 1871. The Complete Work in 6 Vols., including the above Supplement. Price $62.00. A MANUAL OF PRACTICAL ASSAYING. By JOHN MITCHELL, F. C. S. Third Edition, Edited by WILLIAM CROOKES, F. R. S. One Large Octavo Volume, 773 pp., Cloth, $10.00. URE'S DICTIONARY OF ARTS, MANUFACTURES AND MINES. Containing a Clear Exposition of their Principles and Practice. Edited by ROBT. HUNT, F. R. S. Illustrated with nearly 2,000 Engravings on Wood. Sixth Edition, Re-written and greatly Enlarged. 3 vols., 8vo, Cloth, $30.00; Half Russia, $37.50. BRANDE AND COX'S DICTIONARY OF SCIENCE, LITERATURE AND ART. Comprising the Definitions and Derivations of the Scientific Terms in General Use, together with the History and Descriptions of the Scientific Principles of nearly every branch of Human Knowledge. NEW EDITION, GREATLY IMPROVED AND ENLARGED. By W. T. BRANDE and the Rev. GEORGE W. COX. 3 vols., 8vo, Cloth, $20.00; Half Russia, $30.00. A Treatise on the Steam-Engine, IN ITS VARIOUS APPLICATIONS TO Mines, Mills, Steam Navigation, and Agriculture, With Theoretical Investigations respecting the Motive Power of Heat and the Proper Proportions of Steam-Engines; Elaborate Tables of the Right Dimensions of every part, and Practical Instructions for the Manufacture and Management of every species of Engine in actual use. BY JOHN BOURNE. Being the Ninth Edition of "A TREATISE ON THE STEAM-ENGINE," by the "Artizan Club." Illustrated by 38 Plates and 546 Wood-Cuts. 4to, Cloth, $15.00. D. VAN NOSTRAND, PUBLISHER, 23 Murray St. and 27 Warren St. Contents for August, 1872. Illustrations-Three Plates and Eleven Woodcuts. EDITORIAL. PAGE ITEMS AND NOVELTIES-Stevens Institute of Technology, 75; The St. Gothard EDITORIAL CORRESPONDENCE. Determining the Horse-power of Steam Boilers (1 plate)............. Theory and Construction of the Self-Acting Slide- Lathe. By Coleman Sellers, 106 CHEMISTRY, PHYSICS AND TECHNOLOGY. |
