CONTENTS: Chapter I. Lathe and Machine Tools. II. Cutting Speed and Feed. III. Boring Tools for Lathe Work. IV. Screw-cutting Tools. V. General Observations on Lathe Work. VI. Turning Eccentrics. VII. Hand Turning. VIII. Drilling in the Lathe. IX. Boring Bars. X. Laps. XI. Twist Drills. XII. Tool Steel. XIII. Taps and Dies. XIV. Vise-work Tools. XV. Fitting Connecting Rods. XVI. Milling Machines and Milling Tools. XVII. To Calculate the Speed of Wheels, Pulleys, etc. XVIII. The Slide Valve. XIX. How to Set a Slide Valve. XX. Pumps Index. We also publish: THE MODERN PRACTICE OF AMERICAN MACHINISTS AND ENGINEERS. By Egbert P. Watson. Illustrated by 86 engravings. 12mo, $2 50 -->The above or any of our Books sent by mail, free of postage, at the publication price. Our new and enlarged CATALOGUE OF PRACTICAL AND SCIENTIFIC BOOKS--96 pages, 8vo--sent free to any one who will furnish his address. HENRY CAREY BAIRD & CO., Industrial Publishers, Booksellers, and Importers, 810 WALNUT ST., PHILADELPHIA, PA. FOR SALE, A full set of Patent Office Reports, from 1849 to 1872. Price $60. Apply to C. M. ALEXANDER, Washington, D. C. BAND SAWS AND PLANERS a specialty. C. Hodgkins & Son, Marlboro, N. H. [Illustration] 1880 1880 PITTSBURGH EXPOSITION SOCIETY. THE FOURTH EXPOSITION AND FAIR Will open to the public Thursday, September 2, and remain open day and evening (Sundays excepted) until Saturday, October 9th, 1880. Blank forms of application for space, Prospectus, and Premium list may be had by addressing the secretary. Exhibitors are earnestly requested to make early application for space, thus enabling the managers to better arrange the whole Exhibition. New Machinery Hall; new Engine and Boilers. Manufacturers and Inventors should avail themselves of the unsurpassed facilities offered by this Exposition for the introduction of new machinery to the public. OFFICE, GERMANIA BANK BUILDING, 89 WOOD ST. P.O. BOX 895. E. P. YOUNG, I. C. PATTERSON, General Manager. Secretary. JOHN D. BAILEY, Asst. Manager and Cashier. [Illustration: -->SEND STAMP FOR CATALOGUE. TOOLS: TAPS & DIES VISES CHUCKS TWIST DRILLS MACHINE SCREWS LATHES FILES STUBS TOOLS & STEEL TALLMAN & McFADDEN--PHILADELPHIA.] CIGAR BOX LUMBER, MANUFACTURED BY OUR NEW PATENT PROCESS. THE BEST IN THE WORLD. SPANISH CEDAR, MAHOGANY, POPLAR ALSO THIN LUMBER OF ALL OTHER KINDS, 1/8 TO ½ IN., AT CORRESPONDING PRICES. ALL QUALITIES. EQUAL IN ALL RESPECTS TO ANY MADE, AND AT PRICES MUCH UNDER ANY TO BE OBTAINED OUTSIDE OF OUR ESTABLISHMENT. SEND FOR PRICE LIST. GEO. W. READ & CO., 186 TO 200 LEWIS STREET, N. Y. MOSQUITO CATCHER. WILL CLEAR YOUR ROOM IN A FEW MINUTES WITHOUT SMOKE, SOIL, OR GREASE. PRICE 50 CENTS. SEND FOR CIRCULAR. AGENTS WANTED EVERYWHERE. GOOD TERMS. L. T. JONES, 166 LIGHT STREET, BALTIMORE, MD. ROOTS' NEW IRON BLOWER. [ILLUSTRATION]