MEDIEVAL SURVEYOR AT WORK Determining by means of an astrolabe the depth to the water at the bottom of a pit. (Facsimile of a drawing from one of the earliest works on Surveying "Elucidatio Fabrica Ususque Astrolabii," Ioanne Stofterino Iustingensi (1553).) Frontispiece FIELD AND COLLIERY SURVEYING A PRIMER DESIGNED FOR THE USE OF STUDENTS OF SURVEYING AND T. homas Aloysius BY O'DONAHUE, M.I.M.E., F.G.S. FIRST-CLASS CERTIFICATED COLLIERY MANAGER AUTHOR OF "THE COLLIERY ENGINEERS' POCKET BOOK,' MINING FORMULÆ, ETC. MACMILLAN AND CO., LIMITED 1911 First Edition entitled "Colliery Surveying" 1896 Reprinted 1898, 1901, 1904, 1907, 1909 (with additions) Reprinted with additions and entitled “Field and Colliery Surveying" 1911 PREFACE SINCE this book was first issued considerable progress has been made in the art of Colliery Surveying. The demand for a new edition enables me to bring the work up to date, and to do this I have made, in the present volume, extensive revisions and additions. The elementary character of the publication I have endeavoured to retain, but my real aim has been to supply a more or less complete treatise on modern practice in Colliery Surveying. I have also had regard to the Colliery Managers' Examinations and to those of the City and Guilds of London Institute. The relative importance of the various branches of the subject has received my special attention. Certain paragraphs-in some cases whole chapters-have prefixed a double asterisk. The parts so marked contain either more advanced matter or information of lesser importance; I advise the elementary students not to attempt to master them until he is well acquainted with the other portions of the text. If this plan be followed it will facilitate considerably the work of the beginner. 289624 |