Electro-Metallurgy. J. B. C. Kershaw, F.I.C. 7/6 net. ([See p. 39.])

Natural Sources of Power. Robert S. Ball, B.Sc., A.M.I.C.E. 7/6 net.

Radio-Telegraphy. C. C. F. Monckton, M.I.E.E. 7/6 net.

Introduction to the Chemistry and Physics of Building Materials. Alan E. Munby, M.A.(Cantab.). 7/6 net.

The Gas Engine. W. J. Marshall, A.M.I.M.E., and Captain H. Riall Sankey, R.E., M.I.C.E. ([See p. 11.]) 12/6 net.

Photography. Alfred Watkins, Past-President of the Photographic Convention, 1907. 2nd Edn. Revised. 12/6 net. ([See p. 55.])

Wood Pulp. Charles F. Cross, B.Sc., F.I.C., E. J. Bevan, F.I.C., and R. W. Sindall, F.C.S. 2nd Edn. Revised. 8/6 net. ([See p. 52.])

Welding and Cutting of Metals by the Aid of Gases or Electricity. Dr. L. A. Groth. 2nd Imp. 8/6 net.

General Foundry Practice. William Roxburgh. 3rd Imp. 8/6 net.

Commercial Paints and Painting. Arthur Seymour Jennings. 7/6 net.