SCIENCE 



Nxw Seribs 



Vol. XLIII. No. H15 



Friday, May 12, 1916 



Single Copies, 15 Cts. 

 Annual Subsoription, Jt5.0e 



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By Louis Starr, M.D., Fellow of the 

 Royal Society of Medicine, London; 

 Fellow of College of Physicians, Phila- 

 delphia; Formerly Physician to Child- 

 ren's Hospital, Philadelphia. 



In ONE HOUR or a little more, you can 

 read this book through from cover to 

 cover and will acquire in that time a 

 thorough knowledge of the dangers to 

 be encountered during the adolescent 

 period, essential features of growth, de- 

 velopment of muscle power, physical 

 education, diseases, faults and criminal 

 tendencies, etc., of adolescents, together 

 with the excellent methods of the author 

 for combating the dangers and assuring 

 healthful and useful maturity — the out- 

 come of years of professional service and 

 special study. 



"It gives many of the fundamental facts 

 in an open and convincing way. It de- 

 serves a wide circulation." 



— School Science and Mathematics. 



The book will be sent, postpaid, to any 

 address for $1.00. 



By George M. Goxtld, A.M., M.D., 

 Third Edition Revised by R. J. E. Scott, 

 A.M., M.D., B.C.L., New York. 

 The VAST CONTENT of Gould's 

 Medical Dictionary cannot be fully ap- 

 preciated by the mere statement that it 

 contains 70,900 terms, but only upon 

 consideration of the fact that it covers a 

 special field and aims to provide only 

 the words in current use in medicine and 

 related sciences. Nevertheless, it con- 

 tains more than one-sixth as many entries 

 as are found in one of the new English 

 Dictionaries — a work not devoted espe- 

 cially to science but including fiction, 

 religion, proper names, geographical 

 terms, etc., as well as the numerous ob- 

 solete and rare words which it is in its 

 province to contain. 



Gould is printed on thin, opaque paper, 

 specially manufactured, nearly 1000 

 pages, weighs only 214 lbs., 1}4" thick, 

 8M" liigli) 6 J^" wide. Handsome, Flexi- 

 ble Cloth, Marbled Edges, Round 

 Comers, $2.75 Postpaid. With Thumb 

 Index $3.25. Also in Flexible Leather 

 $4.00, Thumb Indexed $4.50. 



P. BLAKISTON'S SON & CO., Publishers 



1012 WALNUT STREET PHILADELPHIA 



