CUMMING.—HEAT TREATED EXPERIMENTALLY. By LinnÆus Cumming, M.A. With 192 Illustrations. Crown 8vo., 4s. 6d.

DAY.—NUMERICAL EXAMPLES IN HEAT. By R. E. Day, M.A. Fcp. 8vo., 3s. 6d.

EMTAGE.—LIGHT. By W. T. A. Emtage, M.A. With 232 Illustrations. Crown 8vo., 6s.

HELMHOLTZ.—ON THE SENSATIONS OF TONE AS A PHYSIOLOGICAL BASIS FOR THE THEORY OF MUSIC. By Hermann von Helmholtz. Royal 8vo., 28s.

MADAN.—AN ELEMENTARY TEXT-BOOK ON HEAT For the Use of Schools. By H. G. Madan, M.A., F.C.S., Fellow of Queen's College, Oxford; late Assistant Master at Eton College. Crown 8vo., 9s.

MAXWELL.—THEORY OF HEAT. By J. Clerk Maxwell, M.A., F.R.SS., L. and E. With Corrections and Additions by Lord Rayleigh. With 38 Illustrations. Fcp. 8vo., 4s. 6d.

SMITH.—THE STUDY OF HEAT. By J. Hamblin Smith M.A., of Gonville and Caius College, Cambridge. Crown 8vo., 3s.

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

WORMELL.—A CLASS-BOOK OF THERMODYNAMICS By Richard Wormell, B.Sc., M.A. Fcp. 8vo., 1s. 6d.

WRIGHT.—Works by MARK R. WRIGHT, M.A.