* * * * * _A Handbook of Electrical Testing._ By H. R. KEMPE, Assoc, of the Society of Telegraph Engineers. _With Illustrations._ Fcap. 8vo, cloth, 5_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 8vo, cloth, 8_s._ * * * * * _Electro-Telegraphy._ By FREDERICK S. BEECHEY, Telegraph Engineer, a Book for Beginners. Fcap. 8vo, cloth, 1_s._ 6_d._ * * * * * _Handrailing: by the Square Cut._ By JOHN JONES, Staircase Builder. Fourth edition. _With seven plates._ 8vo, cloth, 3_s._ 6_d._ * * * * * _Spons’ Engineers’ and Contractors’ Illustrated Book of Prices of Machines, Tools, Ironwork, and Contractors’ Material; and Engineers’ Directory._ Third edition, 4to, cloth, 6_s._ * * * * * _The Gas Consigners Handy Book._ By WILLIAM RICHARDS, C.E. _Illustrated._ 18mo, sewed, 6_d._ * * * * * _A Practical Treatise on Natural and Artificial Concrete, its Varieties and Constructive Adaptations._ By HENRY REID, Author of the ‘Science and Art of the Manufacture of Portland Cement.’ _With numerous woodcuts and plates_, 8vo, cloth, 15_s._ * * * * * _The Gas Analyst’s Manual._ By F. W. HARTLEY, Assoc. Inst. C.E., etc. _With numerous illustrations._ Crown 8vo, cloth, 6_s._ * * * * * _The French-Polisher’s Manual._ By a French-Polisher; containing Timber Staining, Washing, Matching, Improving, Painting, Imitations, Directions for Staining, Sizing, Embodying, Smoothing, Spirit Varnishing, French-Polishing, Directions for Repolishing. Third edition, royal 32mo, sewed, 6_d._ * * * * * _A Pocket-Book of Useful Formulæ and Memoranda for Civil and Mechanical Engineers._ By GUILFORD L. MOLESWORTH, Mem. Inst. C. E., Consulting Engineer to the Government of India for State Railways. Twentieth edition, 32mo, roan, 6_s._; or printed on India paper and bound in pocket-book form, in russia or morocco, 7_s._ 6_d._ SYNOPSIS OF CONTENTS: