_Surveying and Field Work._ =J. Williamson, A.M.Inst.C.E.= Demy 8vo. 9/- net.

CONTENTS.—Surveying. Fundamental Principles. Chain Surveying Instruments—Chain Surveying. Field Operations—Chain Surveying. Running a Survey Line—Chain Surveying. Arrangement of Survey Lines—Chain Surveying. Errors—Chain Surveying. Special Problems. Plotting the Plan. Compass and Sextant Surveying. The Theodolite. Traverse Surveying with the Theodolite. Plotting a Traverse Survey by Angle and Distance. Plotting Traverse Survey by Co-ordinate or Latitude and Departure Method. Triangulation. Some Survey, Traverse and Triangulation Problems. Levelling. Errors in Levelling. Sections, Contours, etc. Setting out Curves, etc. Calculation of Areas. Calculation of Earthwork Quantities—Adjustment of Instruments. Appendix. Geometric and Trigonometric Formulæ. Index.

A catalogue of technical and scientific books published by Constable & Company Ltd — Part 24

_Practical Surveying._ For Surveyors’ Assistants and Students. =Ernest McCullough, C.E.=, Member of the American Society of Civil Engineers. Extra Crown 8vo. 229 Illustrations. 12/- net.

A catalogue of technical and scientific books published by Constable & Company Ltd — Part 24

_The Transition Spiral._ =A. L. Higgins, A.R.C.S.= Crown 8vo. Illustrated. About 7/6 net.

A catalogue of technical and scientific books published by Constable & Company Ltd — Part 24

_The Efficiency of Pumps and Ejectors._ =E. C. Bowden-Smith, M.I.Mech.E.=, etc. Late Egyptian Civil Service. Demy 8vo. Illustrated. (See p. 17.) 14/6 net.

_Water Purification and Sewage Disposal._ =Dr. J. Tillmans=, Director of the Chemical Department of the Municipal Institute of Hygiene, Frankfort-on-Maine. Translated by =Hugh S. Taylor, M.Sc.= 144 + xv pages. Demy 8vo. 9/- net.

_Sewage Disposal Work: Design, Construction and Maintenance._ Being a Practical Guide to Modern Methods of Sewage Purification. =Hugh P. Raikes, M.Inst.C.E.= Demy 8vo. 16/- net.

_The Encyclopædia of Municipal and Sanitary Engineering._ Edited by =W. H. Maxwell, A.M.Inst.C.E.=, Borough and Waterworks Engineer, Tunbridge Wells Corporation, etc. In one volume. Cloth. 42/- net.

_Rainfall, Reservoirs and Water Supply._ =Sir Alexander Binnie.= 9/- net.

CONTENTS.—Rainfall. Average. Fluctuations. Probable Average. Flow from the Ground. Intensity of Floods. Evaporation. Quantity and Rate per Head. Quality, Hardness, etc. Impurities. Filtration. Sources of Supply. Gravitation _versus_ Pumping. Rivers and Pumping Works. Drainage Areas. Deductions from Rainfall. Compensation. Capacity of Reservoirs. Sites of Reservoirs. Puddle Trenches. Concrete Trenches. Base of Embankment. Reservoir Embankments. Puddle Wall. Formation of Embankment. Masonry Dams. Reservoir Outlets. Pipes through Embankment. Culvert under Embankment. Flow through Culverts. Valve Pit. Central Stopping. Tunnel Outlets. Syphon Outlets. Flood or Bye-channel. Waste Watercourse and Waste Weir. Aqueducts. Conduits. Pipes. Service Reservoir. Distribution. Valves. Meters. House Fittings. Index.