8 Scientific Works pubiished by Longmans^ Green^ 6f Co,

��MECHANICS, DYNAMICS, 8TATIC8, HYDROSTATICS, ETC.-

OifniiHuedm

TJVISBJSN.— Works by the Rev. JOHN F. TWISDEN, M.A. PRACTICAL MECHANICS; an Elementary Introduction to

their Study. With 855 Exercises, and 184 Figures and Diagrams. Crowa 8vo., tos. 6d.

THEORETICAL MECHANICS. With 172 Examples,

numerous Exercises, and 154 Diagrams. Crown 8vo., &r. 6d.

IVIZZ I A MS OM—IIJTRODVCTIOIJ TO THE MATHE- MATICAL THEORY OF THE STRESS AND STRAIN OF ELASTIC SOLIDS. By Benjamin Williamson. D.Sc.. F.R.S. Crown 8vo.. 51.

WILLIAMSON AND TARLETON.—hll ELEMENTARY

TREATISE ON DYNAMICS. Containing Applications to Thermodynamics, with numerous Examples. By Benjamin Williamson, D.Sc., F.R.S., and Francis A. Tarlbton, LL.D. Crown 8vo.. lor. 6d.

WOJ^ TH/JVGTOJV.— DYI^AMICS OF ROTATION: an Ele-

mentary Introduction to Rigid Dynamics. By A. M. Worthington, M.A., F.R.S. Crown 8vo., 41. 6d.

��OPTICS AND PHOTOGRAPHY,

ABNEY^^k TREATISE ON PHOTOGRAPHY. BySir William

DE WiVELESLiE Abney. K.C.B., F.R.S., Principal Assistant Secretary of the Secondary Department of the Board of Education. With 134 Illustrations^ Fcp. 8vo., 5J.

GLAZEBROOK,—^VlX'^\(ZKL optics. By R. T. Glazb- Woodcuts of Apparatus, etc. Fcp. 8vo. , ts,

WRIGHT,— OVTICAL PROJECTION : a Treatise on the Use

of the Lantern in Exhibition and Scientific Demonstration. By Lewis Wright, Author of ' Light : a Course of Experimental Optics '. With 33a Illustrations. Crown 8va, 6s.

��SOUND, LIGHT, HEAT, AND THERMODYNAMICS.

2?^ K— NUMERICAL EXAMPLES^ INp.HEAT. By R. E.

Day, M.A.5 Fcp. 8vo., y. 6d.

Z^^Arr-ff^.— ELEMENTARY PRACTICAL SOUND, LIGHT

AND HEAT. By Joseph S. Dexter, B.Sc. (Lond.), Physics Master, Illustrations. Crown 8vo., aj. 6d.

EMTAGE.— LIGHT. By W. T. A. Emtage, M.A., Director of

Education, Mauritius. With 339 Illustrations. Crown 8vo., 6j.

BELMBOLTZ—ON THE SENSATIONS OF TONE AS A

PHYSIOLOGICAL BASIS FOR THE THEORY OF MUSIC. By Hm- MANN VON Helmholtz. Royal 8vo., oSs,

�� �