Successors to A. HART, (late CAREY & HART,) Corner of Chestnut and Fourth Streets, Philadelphia, Have just published the following valuable work: Patent Laws and the Patent Office, Being a Brief History of the Progress of Inventive Genius, including an Abstract of the Laws of Foreign Countries on the subject of Patents; to which is added, a Digest of the Patent Laws of the United States, Decisions of the United States and State Courts in cases of Appeal and otherwise; Opinions in cases of Appeal from Decisions of the Commissioner of Patents, &c., &c.; together with General Directions to Applicants for obtaining patents, with the forms to be observed in Applications; Form of Caveat; Proceedings to be Instituted as preliminary to final Appeal, &c., &c. With an Appendix. By J. G. MOORE, formerly of the New York Courier and Inquirer. 1 vol. 12 mo., cloth, $1.25. A copy will be sent per mail, postage paid to any one who will remit the price of the book to the publishers. AMERICAN LAP-WELD IRON BOILER FLUES, MANUFACTURED BY THE READING IRON TUBE AND FLUE WORKS, Made from 14 to 7 inches in diameter, in lengths to 18 feet, and of the best Pennsylvania refined cold blast charcoal iron, and equal in finish to any imported. Also, made to order, a but-welded flue with patent lap-welded ends, and, when preferred, will be finished with a screw and ferule. FLUES of any thickness of metal, or lengths under 18 feet, made to order. Also, welded wrought iron tubes, for water, steam, and gas. Extra heavy tubes made to order. For sale by our agent, SAMUEL GRIFFITHS, No. 13 North Seventh Street, Philadelphia, and A. B. WOOD, No. 23 Platt Street, New York, or at our Works. SEYFERT, McMANUS & CO., Reading, Peuna M. W. BALDWIN, MANUFACTURER OF LOCOMOTIVE, MARINE, AND STATIONARY On the most approved Models, and unequalled for beauty, durability and Efficiency. All kinds of Machinery furnished to order. Plans and Drawings made free of expense for persons wishing to have work executed Lathe, and tools of every description for Engine Manufacturers, Boiler Makers, Saw Makers; Rolling Milis: Pumps for Water Works and Mines; Blowing Cylinders and Faus for Cupola Furnaces; Screw Bolt Machines; Planing Machines; Callenders; Cotton Presses; Sugar Mills; Eazines and Apparatus for Inclined Planes; Iron and brass Castings; Copper work for Steam Engine Boters, Hydraulic Presses, and Patterns fur. nished with despatch, and executed under the immediate superintendence of the Proprietor. PATENT LAP-WELDED IRON BOILER TUBES. Tubes screwed together, flush on both sides, for Artesian wells, &c. Free-joint Tubes, for Core Bars, Awning Frames, Railings, Leaders, Brass Boiler Tubes, &c. Patent Wrought Iron Blacksmiths' Water-Tuyeres, Water Backs, &c. Agents for Krupp's celebrated Cast Steel for Shafts, Railway Axles, Tires, Platers' Rollers, &c. P S.-All Tools necessary for the construction or keeping in order of Tubular boilers. THOS. PROSSER & SON, 28 Platt Street, New York. The Journal of the Franklin Institute IS PUBLISHED ON THE FIRST OF EACH MONTH, At Five Dollars per annum for one copy, Eight Dollars for two copies, and Ten Dollars for three copies Payable on the completion of the Sixth Number. The Journal will be delivered free of Postage when the subscription is paid in advan ́e, (see postages and remittances on last page of the cover.) Communications and letters on business must be directed TO THE ACTUARY OF THE FRANKLIN INSTITute, PhiladelpHIA;-the postage paid. The Journal can also be obtained from the following: CHARLES S. FRANCIS & CO., City of New York. LITTLE & Co., Albany, New York. CROSBY, NICHOLS & CO., Boston, Massachusetts. HENRY WHIPPLE & SON, Salem, N. HICKMAN, Baltimore, Maryland. F. TAYLOR, Washington, District of Columbia. ALEXANDER YOUNG, Camden, South Carolina. ALFRED C. JONES, New Orleans, Louisiana. London—EDWARDS, SANDFORD & Co, No. 17 Cornhill, Who are authorised to receive subscriptions, and to make exchanges for periodicals devoted to the Arts and Sciences. Patent Hammered Railroad, Ship and Boat Spikes. The Albany Iron Works have always on hand, of their own Manufacture, a large assortment of Railroad, Ship and Boat Spikes, From 2 to 12 inches in length, and of any form of head. From the excellence of the material always used in their manufacture, and their very general use for railroads and other purposes in this country, the manufacturers have no hesitation in warranting them fully equal to the best Spikes in market, both as to quality and appearance. All orders addressed to the subscriber at the works, will be promptly executed. J. H. JACKSON, Agent, Albany Iron Works, Troy, N. Y. The above Spikes may be had at factory prices of Erastus Corning & Co., Albany, And E. Pratt & Brether, Baltimore, Md. FOSTAGES AND REMITTANCES. Subscribers when remitting payment for the Journal through the Post Office, will please request the Postmuster to register the Post Office at Philadelphia, whic with these precautions, the Ins...e will assume the risk; and when inade in advance, the SUBSCRIPTION Pai-Five dollars fur un copy, right dollars for two copies, or lea Contents for March, 1855. CIVIL ENGINEERING. On the Durability of Railroad Iron. By Wm. Truran, Esq., Disquisition on the Laws regulating the Slips of Screw Propellers in function of form and dimension, based on a Drgest of the Experiments made in 1845, by M. Bourgeois, Eng. By B. F. Isherwood, Chief Engineer, U. S. N., Thirty-fifth General Report of the Chesapeake and Delaware Canal Company, AMERICAN PATENTS. Remarks on H. Howson's claim to the design and working, drawings of the ib. FRANKLIN INSTITUTE. Wolfe Street and River Potomac, Alexandria, Va. SMITH & PERKINS, Proprietors, manufacture Locomotive Engines and Tenders; Marine and Stationary Engines and Boilers; Chilled Car Wheels and Axles; Patent Chilled and Wrought Slip-tire; Machinery and Castings generally. The undersigned having erected very extensive shops, and procured the most modern machinery and tools, are prepared to execute orders for LocoMOTIVE Engines, Cars, AND MACHINERY of all kinds, with despatch, and on the most favorable terms. R. C. SMITH, Late of the Alexandria Iron Works. THATCHER PERKINS, Late Master of Machinery on the Balt. & O. Railroad. CHAS. H. HASWELL, No. 6 Bowling Green, New York, Late Engineer in Chief U. S. N., Consulting and Superintending Engineer, and Surveyor of Steamers for the Underwriters of New York, Philadelphia, Boston, and at Lloyd's, London. Designs, Specifications, and Contracts for Steam Vessels, Steam Engines, Boilers, Mills, &c., either for marine or land purposes, will be furnished upon application. Superintendence of the construction and repairs of steam vessels and their dependencies and of steamers in operation. For Sale, Steamers, Steamboats, Steam Engines, &c. of all descriptions, a Registry of which can be referred to on application. Engineers, Steamers, &c., &c., furnished with Worthington Pumps; Independent, Steam Fire and Bilge Pumps, Salinometers, Machinery Oil, Steam and Vacuum Gauges, Wire Rope, &c., &c., &c. AMERICAN AND EUROPEAN AGENCY. I am prepared through my Agents and Partners, to obtain Letters Patent for American Inventions, in the Canadas and different portions of Europe, or to dispose of Patent Rights advantageously. JAS. C. G. KENNEDY, Late of Census Office, Washington. To Readers and Correspondents. The Committee on Publications, anxious to render this work as valuable as possible have determined to offer a liberal compensation for original articles on the subjects to which this Journal is devoted; and they acccordingly invite mechanics and men of science to communicate their observations. |