BOOKS FOR RAILROAD MEN. SPECIAL NOTICE,—All of the Books from which extracts are made in this work, comprising Haswell, Trautwine, Hamilton, Haslett, &c., &c., are for sale by me, and may be ordered by mail. USEFUL INFORMATION FOR RAILROAD MEN.-Compiled by W. G. HAMILTON, Engineer. Fifth edition, revised and enlarged. 570 pages. Pocket form, Morocco gilt, $2.00. "The Information' comprises some valuable formulæ and rules for the construction of boilers and engines, masonry, properties of steel and iron, and the strength of materials generally. IRON TRUSS BRIDGES FOR RAILROADS.-The method of calculating strains in Trusses, with a careful comparison of the most prominent Trusses in reference to economy in combination, etc., etc. By Brevet-Colonel W. E. MERRILL, U.S.A., with nine lithographed plates of illustrations. cloth, $5.00. 4to. A TREATISE ON THE STRENGTH OF BRIDGES AND ROOFS.-With practical applications and examples, for the use of Engineers and Students. By S. H. SHREVE, A.M.C.E. 346 pages, and 89 wood cuts. 8vo., tinted paper, cloth, $5.00. THE THEORY OF STRAINS IN GIRDERS, and other similar structures, with Observations on the application of Theory to Practice, and Tables of strength and other properties of materials. By BINDON B. STONEY. New edition, revised and enlarged, and complete in one volume, with 5 plates and 123 wood cut illustrations. Royal 8vo., 660 pages, cloth, $15.00, VAN NOSTRAND'S ECLECTIC ENGINEERING MAGAZINE, which commenced its Fifth Year, January, 1873, is admirably adapted to meet the wants, not only of Engineers, but of all who are interested in Scientific subjects. It presents in a convenient form the best articles, (with their illustrations,) selected from European and American Scientific Journals, together with Original Papers from leading scientists of our times. Issued Monthly, at $5.00 per Annum in Advance. Persons who desire the Magazine from the beginning, can be supplied with Vols. I to VII, inclusive, neatly bound in cloth, for $20.00; half Turkey morocco, $30.00. D. VAN NOSTRAND, PUBLISHER, 23 MURRAY ST. & 27 WARREN ST., NEW YORK. **Copies of the above Books sent free by mail on receipt of price, and New Catalogue of Scientific Books sent to any address on application. SQUARES, CUBES, SQUARE ROOTS, AND CUBE ROOTS-Continued. THIS TABLE IS TAKEN FROM For the Ramapo and Foundry Co. "Hamilton's Useful Information for Railway Men," Published by D. VAN NOSTRAND, Wheel 8.895 661 436921 288804781 25.709 8.710 691 477481 329939371 26.286 8.840 687 688 689 8.942 BAR, PLATE and SHEET IRON, TIN PLATES and METALS. SOLE AGENTS FOR HOWELL & COMPANY'S SHEFFIELD EXTRA CAST STEEL AND FILES. IMPORTERS OF LAP WELDED IRON FLUES, TORPEDO FOG SIGNALS, SALTER'S LOCOMOTIVE BALANCES, &c., &c. NEW YORK RUBBER COMPANY. [INCORPORATED 1851.] MANUFACTURERS OF STANDARD RUBBER GOODS, FOR RAILROAD PURPOSES, COMPRISING CAR SPRINGS, PACKING, HOSE and BELTING. These Goods are to be had of our Agents in all the principal Cities of the Union, and at our WAREHOUSE, Nos. 5 & DEY ST., NEW YORK. Address P. O. Box 1160. Wheel Borers. Isaac H. Shearman. .Philadelphia, Pa............See Page 80 BELTING. (Hamilton.) Horse-power of a belt equals velocity in feet per minute, multiplied by the width-the sum divided by 1000. One inch single belt, moving at 1000 feet per minnte = 1 horse-power. For couble belts of great length, over large pulleys, allow about 500 feet per minute per 1 inch of width per horse-power. Power should be communicated through the lower running side of a belt; the the upper side to carry the slack. Average breaking weights of a belt, 6 X 1 inch wide. 16 Leather, 530 lbs.: 3-ply rubber, 600 lbs. The strength of a belt increases directly as its width. The co-efficient of safety for a laced belt is- Leather = e breaking weight. Squares, Cubes, Square Roots, and CUBE ROOTS-Continued. THIS TABLE IS TAKEN FROM and Foundry Co. "Hamilton's Useful Information for Railway Men," For the Ramapo Published by D. VAN NOSTRAND, Wheel 721 519841 374805361 26.851 8.966 751 564001 423564751 27.404 9.089 722 521284 376367048 26.870 8.971 752 565504425259008 27.4229.093 723 522729 377933067 26.888 8.975 753 567009 426957777 27-4409.097 724 524176 379503424 26.9078.979 754 568516 428661064 27.459 9.101 725 525625 381078125 26.925 8.983 755 570025 430368875 27.477 9.105 726 527076 382657176 26.944 8.987 756571536 432081216 27.495 9.109 727 528529 384240583 26.9628.991 757 573049 433798093 27.5139.113 728 529984 385828352 26.981 8.995 758 574564 435519512 27.5319.117 729 531441 387420489 27.0 19.0 759 576081 437245479 27·549 9.121 730 532900 389017000 27.0189 004 760 577600 438976000 27.5689.125 731 534361 390617891 27.037 9.008 761 579121 440711081 27.5869.129 732 535824 392223168 27.055 9.012 762 580644 442450728 27.604 9.133 733 537289 393832837 27.073 9.016 763 582169 444194947 27.622 9.137 734 538756 395446904 27.092 9.020 764 583696 445943744 27.6409.141 735 540225 397065375 27.1109.024 765 585225 447697125 27.6589.145 736 541696 398688256 27.129 9.028 766 586756 449455096 27.6769.149 737 543169 400315553 27.147 9.032 767 588289451217663 27.694 9.153 738 544644 401947272 27.1669.036 768 589824 452914832 27.7129.157 739 546121 403583419 27.1849.040 769 591361 454756609 27.7309.161 740 547600 405224000 27.2029.045 770 592900 456533000 27.7489.165 741 549081 406869021 27.221 9.049 771 594441 458314011 27.7669. 169 742 550564 408518488 27.2399.053 772 595984 460099648 27.7849.173 743 552049 410172407 27.258 9.057 773 597529 461889917 27.8029.177 744 553536 411830784 27.276 9.061 774 599076 463684824 27.8209.181 745 555025 413493625 27.2949.065 775 600625 465484375 27.8389.185 746 556516 415160936 27.3139.069 776 602176 467288576 27.8569.189 747 558009 416832723 27.3319.073777603729465097433 27.8749.193 748 559504 418508992 27.3499.077 778 605284 470910952 27.8929.197 749 561001 420189749 27. 367 9.081 779 606841 472729139 27.9109.201 750 562500 421875000 27.386 9.085 780 608400 474552000 27.928 9.205 Continued on Page 265 O. W. CHILD, 22 PINE ST., NEW YORK. Railroad Iron and Supplies, American and English Iron and Steel Rails, FREIGHT CARS, viz. BOX, FLATS, CONDOLAS, COAL, HAY and STOCK. FISH PLATES, SPIKES, BOLT3 and NUTS, OLD RAILS BOUGHT AND SOLD. Railroad Bonds and Securities Negotiated. CHARLES F. KETCHAM, PRINTER, STATIONER, LITHOGARPHER, AND BLANK BOOK MANUFACTURER, Nos. 27 & 29 Nassau Street, New York. RAILROAD PRINTING A SPECIALTY. Orders for every kind of BLANK FORMS AND BOOKS required by Railroad or Transportation Companies, executed in the neatest style, and with the utmost economy and promptness. My long experience in this branch of the business, renders me familiar with the wants of this class of customers, and the accumulation of Forms and Copies is of great and mutual advantage, and especially so to parties desiring to make CHANGES IN THEIR FORMS or about procuring OUTFITS FOR NEW ROADS. WAY BILLS, VOUCHERS, REPORTS AND BLANKS of any kind, of which impressions are to be taken with the Copying Press, Printed and ruled in Copying Ink. LITHOGRAPHIC work, comprising Bonds, Certificates of Stock, Drafts, Checks, Time Charts, Passes, Letter and Note Headings, Maps, &c., executed in the best style and on the most favorable terms. ENGINEERS' MATERIALS manufactured, imported and kept on hand in great variety. BLANK BOOKS of any desired pattern or quantity made to order. A full line of Staple and Fancy STATIONERY constantly on hand and for sale at the lowest market rates. SAMPLES AND ESTIMATES FURNISHED ON APPLICATION. |