MESSRS. MUNN & Co. have had an experience of over twenty years-nearly a quarter of a century—in the business of obtaining Patents. Upwards of TWENTY THOUSAND Patents have been obtained by them, and more than one third of all Patents granted are now secured through them. It is needless to add that they are thoroughly conversant with the whole subject, and that their facilities and experience are unsurpassed. Nearly all of the most distinguished and successful patentees of this country are among their clients. The first inquiry that presents itself to one who has made any improvement or discovery is: " Can I obtain a Patent?" Those who have made inventions and desire to consult with MUNN & Co., are cordially invited to do so. We shall be happy to see them in person at our office, or to advise them by letter. In all cases they may expect from us an honest opinion. For such consultations, opinion, and advice, we make no charge. A pen-and-ink sketch and a description of the invention should be sent, together with stamps for return postage. Write plain; do not use pencil nor pale ink; be brief. All business committed to our care, and all consultations, are kept by us, secret and strictly confidential. Address MUNN & Co., 37 Park Row, New York. Quick Applications.-When, from any reason, parties are desirous of applying for Patents, or Caveats, IN GREAT HASTE, without a moment's loss of time, they have only to write or telegraph us specially to that effect, and we will make special exertions for them. We can prepare and mail the necessary papers in less than an hour's notice, if required. For instructions concerning Caveats, Foreign Patents, Reissues, Interferences, Hints on Selling Patents, Rules, and Proceedings at the Patent Office, the Patent Laws, etc., see our Instruction Book. MUNN & CO., 37 PARK ROW, N. Y. OFFICE IN WASHINGTON, CORNER F AND SEVENTH STS. THE MODERN PRACTICE OF AMERICAN MACHINISTS & ENGINEERS, INCLUDING THE CONSTRUCTION, APPLICATION, AND USE OF DRILLS, PRACTICE AT VICE, AND THE THE LATHE, TOGETHER WITH WORKSHOP MANAGEMENT, ECONOMY OF MANUFACTURE, BY EGBERT P. WATSON, LATE OF THE SCIENTIFIC AMERICAN." Illustrated by Eighty-Six Engravings. PHILADELPHIA: HENRY CAREY BAIRD, INDUSTRIAL PUBLISHER, 406 WALNUT STREET. LONDON: TRÜBNER & CO., 60 PATERNOSTER ROW Jift- Pac. Coast Eng. Co Entered according to Act of Congress, in the year 1866, by HENRY CAREY BAIRD, In the Clerk's Office of the United States District Court, in and for the معل TJ1160 ! PREFACE. W3 Ir is not claimed by the author that this little volume covers the whole art and mystery of Machine making, but he nevertheless confidently hopes and believes that apprentices and others, who are seeking reliable information upon this subject, will here find something new and of real and permanent interest. Those persons generally who are interested in Steam-engines and Boilers, will also find various points touched upon, with more or less amplitude, which are of importance to them. The matter will be found to be purely American, and must therefore possess additional practical value to American chanics. NEW YORK, October 13, 1866. me M289323 |