---- ---- causes of failure, 2-4 ---- boring, 60-80 ---- sinking, 40 Well-water, storing, 206 Wealden clay, 5 Wedging cribs, 94, 95 Weight of water in wells, 204 Westbourne Grove, well at, 200 West Drayton, wells at, 200 West Ham, wells at, 102 West India Dock, well at, 201 Westminster, wells at, 201 Wet stone, shot-holes in, 50 Whitechapel, wells at, 201 Willesden, well at, 201 Wimbledon, wells at, 201 Windsor station well, 160 Windsor, wells at, 201 ---- wells at Old, 197 Winchfield, well at, 189 Windlass, 42, 60, 72 Winkfield Plain, well at, 201 Witham, well at, 201 Withdrawing tools, 64 Withdrawing tubes, 74-79 Wolverhampton, wells at, 166 Wooden drum curb, 41, 42 ---- rods, 89, 101, 106 Wood tubbing, 95 Woodley Lodge, well at, 201 Woolwich beds, 5 ---- wells at, 201 Worm-auger, 64 Wormley, wells at, 201 Wormwood Scrubbs, well at, 201 Wrought-iron tubes, 66 LONDON: PRINTED BY WILLIAM CLOWES AND SONS, STAMFORD STREET AND CHARING CROSS. E. & F. N. SPON'S NEW BOOKS. Crown 4to, cloth, 36_s._ _Pyrology; or, Fire Chemistry._ A Science interesting to the general Philosopher, and an Art of infinite importance to the Chemist, Mineralogist, Metallurgist, Geologist, Agriculturist, Engineer (Mining, Civil, and Military), &c., &c. By WILLIAM ALEXANDER ROSS, lately a Major in the Royal Artillery. Crown 8vo, cloth, 8_s._ _Electricity: Its Theory, Sources, and Applications._ By JOHN T. SPRAGUE, Member of the Society of Telegraph Engineers. With 91 Woodcuts and 30 valuable Tables. Crown 4to, cloth, 15_s._ _The Draughtsman's Handbook of Plan and Map Drawing_, including Instructions for the preparation of Engineering, Architectural, and Mechanical Drawings, with numerous Illustrations and Coloured Examples. By G. G. ANDRÉ, F.G.S., Member of the Society of Engineers, Assoc. Inst. C.E. Second Edition, royal 8vo, cloth, 12_s._ 6_d._ _A Practical Treatise on the Science of Land and Engineering Surveying, Levelling, Estimating Quantities, &c._ With a General Description of the several Instruments required for Surveying, Levelling, Plotting, &c. By H. S. MERRITT. 41 fine Plates, with Illustrations and Tables. With Portrait, 8vo, cloth, 12_s._ 6_d._ _The Autobiography of Sir John Rennie, past President of the Institution of Civil Engineers, F.R.S., &c., &c._ Edited by his Son, C. G. C. Rennie. Crown 8vo, cloth, 5_s._ _Arbitrations: a Text-Book for Surveyors, in tabulated form._ By BANISTER FLETCHER, A.R.I.B.A., Author of 'Model Houses,' 'Dilapidations,' 'Compensations,' &c. 32mo, roan, 4_s._ 6_d._; or cloth, 3_s._ 6_d._ _Spons' Architects' and Builders' Pocket-Book of useful Memoranda and Prices for 1875._ By W. YOUNG, Architect, Author of 'Picturesque Architectural Studies,' &c. Crown 4to, cloth, 15_s._ _Practical Geometry and Engineering Drawing_.