The STEAM ENGINE. By George C. V. Holmes, Whitworth Scholar; Secretary of the Institution of Naval Architects, With 212 Woodcuts. Price 6s.

ELECTRICITY and MAGNETISM. By Fleeming Jenkin, F.R.SS. L. & E. late Professor of Engineering in the University of Edinburgh. With 177 Woodcuts. Price 3s. 6d.

THEORY of HEAT. By J. Clerk Maxwell, M.A. LL.D. Edin. F.R.SS. L. & E. With 41 Woodcuts. Price 3s. 6d.

TECHNICAL ARITHMETIC and MENSURATION. By Charles W. Merrifield, F.R.S. Price 3s. 6d. Key, by the Rev. John Hunter, M.A. Price 3s. 6d.

INTRODUCTION to the STUDY of INORGANIC CHEMISTRY. By William Allen Miller, M.D. LL.D. F.R.S. With 72 Woodcuts. Price 3s. 6d.

TELEGRAPHY. By W. H. Preece, F.R.S. M.I.C.E, and J. Sivewright, M.A. C.M.G. With 160 Woodcuts. Price 5s.

The STUDY of ROCKS, an ELEMENTARY Text-Book of PETROLOGY. By Frank Rutley, F.G.S. of Her Majesty's Geological Survey. With 6 Plates and 88 Woodcuts. Price 4s. 6d.

WORKSHOP APPLIANCES, including Descriptions of some of the Gauging and Measuring Instruments—Hand-Cutting Tools, Lathes, Drilling, Planing, and other Machine Tools used by Engineers. By C. P. B. Shelley, M.I.C.E. With 291 Woodcuts. Price 4s. 6d.

STRUCTURAL and PHYSIOLOGICAL BOTANY. By Dr. Otto Wilhelm Thomé, Rector of the High School, Cologne, and A. W. Bennett, M.A. B.Sc. F.L.S. With 600 Woodcuts and a Coloured Map. Price 6s.

QUANTITATIVE CHEMICAL ANALYSIS. By T. E. Thorpe, F.R.S. Ph.D. Professor of Chemistry in the Andersonian University, Glasgow. With 88 Woodcuts. Price 4s. 6d.