CARUS-WILSON.—ELECTRO-DYNAMICS: the Direct-Current Motor. By Charles Ashley Carus-Wilson, M.A. Cantab. With 71 Diagrams, and a Series of Problems, with Answers. Crown 8vo., 7s. 6d.

CUMMING.—ELECTRICITY TREATED EXPERIMENTALLY. By LinnÆus Cumming, M.A. With 242 Illustrations. Cr. 8vo., 4s. 6d.

DAY.—EXERCISES IN ELECTRICAL AND MAGNETIC MEASUREMENTS, with Answers. By R. E. Day. 12mo., 3s. 6d.

GORE.—THE ART OF ELECTRO-METALLURGY, including all known Processes of Electro-Deposition. By G. Gore, LL.D., F.R.S. With 56 Woodcuts. Fcp. 8vo., 6s.

HENDERSON.—Works by JOHN HENDERSON, D.Sc., F.R.S.E.

JENKIN.—ELECTRICITY AND MAGNETISM. By Fleeming Jenkin, F.R.S.S., L. and E., M.I.C.E. With 177 Illustrations. Fcp. 8vo., 3s. 6d.

JOUBERT.—ELEMENTARY TREATISE ON ELECTRICITY AND MAGNETISM. By G. C. Foster, F.R.S., and E. Atkinson, Ph.D. With 381 Illustrations. Crown 8vo., 7s. 6d.

JOYCE.—EXAMPLES IN ELECTRICAL ENGINEERING. By Samuel Joyce, A.I.E.E. Crown 8vo., 5s.

LARDEN.—ELECTRICITY FOR PUBLIC SCHOOLS AND COLLEGES. By W. Larden, M.A. With 215 Illustrations. Cr. 8vo., 6s.

MACLEAN AND MARCHANT.—ELEMENTARY QUESTIONS IN ELECTRICITY AND MAGNETISM. With Answers. Compiled by Magnus Maclean, D.Sc., M.I.E.E., and E. W. Marchant, D.Sc., A.I.E.E. Crown 8vo., 1s.

MERRIFIELD.—MAGNETISM AND DEVIATION OF THE COMPASS. By John Merrifield, LL.D., F.R.A.S., 18mo., 2s. 6d.

PARR.—PRACTICAL ELECTRICAL TESTING IN PHYSICS AND ELECTRICAL ENGINEERING: being a Course suitable for First and Second Year Students and others. By G. D. Aspinall Parr, Assoc. M.I.E.E., Head of the Electrical Engineering Department, Yorkshire College, Victoria University. With Illustrations. Crown 8vo.

POYSER.—Works by A. W. POYSER, M.A.

SLINGO AND BROOKER.—Works by W. SLINGO and A. BROOKER.

TYNDALL.—Works by JOHN TYNDALL, D.C.L., F.R.S. See p. 28.