Published with Concurrence of the Surveyors-General of New South Wales and Victoria. Second Edition. Ilalf-Bound, Folio, Price 21s. TRAVERSE TABLES: Computed to 4 Places Decimals for every Minute of Angle up to 100 of Distance. FOR THE USE OF SURVEYORS AND ENGINEERS. BY R. LLOYD GURDEN, Authorised Surveyor for the Governments of New South Wales and, Victoria "Mr. GURDEN is to be thanked for the extraordinary labour which he has bestowed on facilitating the work of the Surveyor. An almost unexampled instance of professional and literary industry."-Athenæum. "Those who have experience in exact SURVEY-WORK will best know how to appreciate the enormous amount of labour represented by this valuable book. The computations enable the user to ascertain the sines and cosines for a distance of twelve miles to within half an inch, and this BY REFERENCE TO BUT ONE TABLE, in place of the usual Fifteen minute computations required. This alone is evidence of the assistance which the Tables ensure to every user, and as every surveyor in active practice has felt the want of such assistance, few knowing of their publication will remain without them."-Engineer. "We cannot sufficiently admire the heroic patience of the author. who, in order to prevent error, calculated each result by two different modes, and, before the work was finally placed in the Printers' hands, repeated the operation for a third time, on revising the proofs."-Engineering. SECOND ENLARGED AND REVISED EDITION. In Royal 8vo, with Numerous Illustrations, 36s. ELEMENTS OF METALLURGY: A Practical Treatise on the Art of Extracting Metals from their Ores. BY J. ARTHUR PHILLIPS, C.E., F.R.S., F.C.S., F.G.S., Ancien Elève de l'Ecole des Mines, Paris. REWRITTEN AND EDITED BY THE AUTHOR, AND BY H. BAUERMAN, F.G.S. CONTENTS.-Refractory Materials-Fire-clays-Fuels, &c.-Antimony-Arsenic-ZincIron-Cobalt-Nickel-Mercury-Bismuth-Lead-Aluminium - Copper-Tin - Gold— "The value of this work is almost inestimable."-Mining Journal. Silver-Platinum, &c. ** Many NOTABLE ADDITIONS will be found in the sections devoted to IRON, LEAD, COPPER, SILVER, and GOLD, dealing with new Processes and Developments. Medium Svo, with 43 Lithographic Plates and numerous other HYDRAULIC POWER AND HYDRAULIC MACHINERY, BY H. ROBINSON, M. INST. C.E., Professor of Surveying and Civil Engineering, King's College, London. "A book of great Professional usefulness."—Iron. LONDON: CHARLES GRIFFIN & CO., EXETER ST., STRAND. ON' MINE-SURVEYING. BY BENNETT H. BROUGH, ASSOCIATE OF THE ROYAL SCHOOL OF MINES; FELLOW OF THE GEOLOGICAL SOCIETY AND OF AT THE ROYAL SCHOOL OF MINES. SECOND EDITION, REVISED. With numerous Diagrams. LONDON: CHARLES GRIFFIN AND COMPANY, EXETER STREET, STRAND. 1889. (All Rights Reserved.) |