FIRST PRINCIPLES OF HEREDITY

By S. Herbert, M.D., M.R.G.S., L.B.C.P. Contaiuing 75 illustrations.

Crown Svo, cloth, price 5s. net.

SURGERY.

TEXT-BOOK OF OPERATIVE SUR- GERY. By Dr. Th. Ivo<;uer. Tliird English Ed'ition. With over 300 Illustrations, many with colour introduced.

Tr.anslatcd bv Haroi.d J. Stiles, JI.B., F.R.C.S. (Ed'in.), from the Fifth German Edition. Royal Svo, cloth, price 30s. net.

TECHNICAL BOOKS, Etc.

A TREATISE ON HYDRAULICS. By

Prof. W. Cawïhorne Unwin, LL.D., F.R.S., M.Insr.C.E., Hon. M.I.M.E. Author of " Hydraulios " in " Enc> clopa;dia Britannica." Illustrated. Demy sv... cloth, priée 12s. 6d. net.

HANDBOOK OF LITHOGRAPHY. By David Cumming. An exhaustive, practical treatise on the varions methods adopted in working the process. With rnany Illustrations and coloured plates.

Crown Svo, cloth, price 6s. net.

MILK: Its Nature and Composition.

By C. M. AïKMAN. Third Edition.

Edited by Prof. J. Prince Shkldon and Prof. Golding. Crown Svo, cloth, illustrated, price 3s. 6d.