( APR 10 1990 1 



SCIENCE 



NEW SERIES Fkiday, April 9, 1920 f""^^' copies, 15 cts. 



vol. Ill, No. 1319 ' ' Annual Subscbiption, SS.Od 



The Preparation of Organic 

 Compounds 



This work gives a general outline of the methods actually employed in preparing or- 

 ganic compounds and provides, not only a laboratory guide, but also a book which may 

 be used as a companion volume to the usual theoretical textbook. This is the second 

 edition to which the author has added new material and made some alterations. 



Descriptions of processes are brief but sufficient detail is given to insure successful 

 work. 



By E. DE Barry Barnett, B.Sc. (Lond.), A.I.C, Second Edition with 54 Illustra- 

 tions. Cloth, f3.25 Postpaid. 



Foot Care And Shoe Fitting 



The investigations made by the authors of this work have been very thorough and 

 are of great practical value to all persons. While pedestrian motion remains a vital 

 factor in bringing the units of modern armies into position, the almost countless mil- 

 lions who walk and stand in their daily avocations are no less interested in learning 

 the result of these investigations under conditions which are calculated to establish the 

 truth. 



By W. L. Mann, Ph.B., A.M., M.D., Lieut-Command. (M. C.) U. S. Navy; and 

 S. A. Foi^OM, M.D., Lieut. (M. C.) U. S. Navy. 58 Illustrations. Cloth, J1.75 Postpaid. 



Mind And Its Disorders 



since the first edition of this work the author has fundamentally changed his atti- 

 tude toward mental disease, having personally investigated very many patients by the 

 psycho-analytic method and thus been convinced of the truth of Freud's doctrine. The 

 classiiication has been completely remodelled and new chapters added. 



By W. H. B. StoddarT, M.D., F.R.C.P., Lecturer on Mental Diseases, St. Thomas' 

 Hospital Medical School, (Lond.), etc. Third Edition, 77 Illustrations. Cloth, $6.00 

 Postpaid. 



P. BLAKISTON'S SON & CO., Publishers, PHILADELPHIA 



