Electrical Standards.
Reports of the Committee on Electrical Standards appointed by the British Association, revised by Sir W. Thomson, Dr. J. P. Joule, Professors Clark, Maxwell, and Fleeming Jenkin, with a Report to the Royal Society on Units of Electrical Resistance, by Prof. F. Jenkin, edited by Professor Fleeming Jenkin, F.R.S., plates, 8vo, cloth
9 0
Electric Telegraph.
Electrical Tables and Formulæ for the Use of Telegraph Inspectors and Operators, compiled by Latimer Clark and Robert Sabine, with wood engravings, crown 8vo, cloth
12 6
Engineering.
Spons' Dictionary of Engineering, Civil, Mechanical, Military, and Naval, with technical terms in French, German, Italian, and Spanish, 3100 pp., and nearly 8000 engravings, super-royal 8vo, in
8 divisions, cloth, 13s. 6 d. each