PUBLISHED BY E. & F. N. SPON. 13 



A Practical Treatise on the Science of Land and 



Engineering Surveying, Levelling, Estimating Quantities, etc., with a 

 general description of the several Instruments required for Surveying, 

 Levelling, Plotting, etc. By H. S. MERRETT. Third edition, 41 plates 

 with illustrations and tables, royal 8vo, cloth, 12s. 6d. 



PRINCIPAL CONTENTS : 



Part i. Introduction and the Principles of Geometry. Part 2. Land Surveying; com- 

 prising General Observations The Chain Offsets Surveying by the Chain only Surveying 

 Hilly Ground To purvey an Estate or Parish by the Chain only Surveying with the 

 Theodolite Mining and Town Surveying Railroad Surveying Mapping Division and 

 Laying out of Land Observations on Enclosures Plane Trigonometry. Part 3. Levelling 

 Simple and Compound Levelling The Level Book Parliamentary Plan and Section 

 Levelling with a Theodolite Gradients Wooden Curves To Lay out a Railway Curve- 

 Setting out Widths. Part 4. Calculating Quantities generally for Estimates Cuttings and 

 Embankments Tunnels Brickwork Ironwork Timber Measuring. Part 5. Description 

 and Use of Instruments in Surveying and Plotting The Improved Dumpy Level Troughton's 

 Level The Prismatic Compass Proportional Compass Box Sextant Vernier Panta- 

 graph Merrett's Improved Quadrant Improved Computation Scale The Diagonal Scale 

 Straight Edge and Sector. Part 6. Logarithms of Numbers Logarithmic Sines and 

 Co-Sines, Tangents and Co-Tangents Natural Sines and Co-Sines Tables for Earthwork, 

 for Setting out Curves, and for various Calculations, etc., etc., etc. 



Saws : the History, Development, Action, Classifica- 

 tion, arid Comparison of Saws of all kinds. By ROBERT GRIMSHAW. 

 IVith 22O illustrations, 410, cloth, I2J. 6d. 



A Supplement to the above ; containing additional 



practical matter, more especially relating to the forms of Saw Teeth for 

 special material and conditions, and to the behaviour of Saws under 

 particular conditions. With 120 ilhistrations, cloth, 9^. 



A Guide for the: Electric Testing of Telegraph Cables. 



By Capt. V. HOSKICER, Royal Danish Engineers. With illustrations, 

 second edition, crown 8vo, cloth, 4J. 6d. 



Laying and Repairing Electric Telegraph Cables. By 



Capt. V. HOSKICER, Royal Danish Engineers. Crown 8vo, cloth, 

 $s. 6<t. 



A Pocket- Book of Practical Rules for the Proportions 



of Modern Engines and Boilers for Land and Marine purposes. By N. P. 

 BURGH. Seventh edition, royal 32010, roan, 45-. 6d. 



Table of Logarithms of the Natural Numbers, from 



i to 108,000. By CHARLES BABBAGE, Esq., M.A. Stereotyped edition, 

 royal 8vo, cloth, "js. 6d. 



To ensure the correctness of these Tables of Logarithms, they were compared with Callett's, 

 Vega's, Hutton's, Briggs', Gardiner's, and Taylor's Tables of Logarithms, and carefully read 

 by nine different readers ; and further, to remove any possibility of an error remaining, the 

 stereotyped sheets were hung up in the Hall at Cambridge University, and a reward offered 

 to anyone who could find an inaccuracy. So correct are these Tables, that since their first 

 issue in 1827 no error has been discovered. 



