SCIENCE 



New Series ^?r>TT^^17• Ar»T>/-iTi Q 1Q1Q Sinolk Copies, 15 Ct». 



VOL. XLVII NO. 1210 J^RIDAY, March b, IJlh annual subscription, $5.00 



Recent Blakiston Books 



MARSHALL— 

 Short Account of Explosives 



By ARTHUR MARSHALL, A.C.G.I., F.C.S., F.LC, Chemical Inspector, British 

 Ordnance Department. 



It presents clearly and concisely the main facts regarding the various kinds of explo- 

 sives in use and the most recent developments in the subject. The language is untech- 

 nical and the descriptions are calculated to give the reader a clear conception of the 

 subject. 29 Illustrations. 8vo. Cloth, $1.50 postpaid. 



FORD— 

 Military Medical Administration 



By JOSEPH H. FORD, B.S., M.A., M.D., Colonel Medical Corps, U. S. Army. 

 Approved for Publication by the Surgeon General, U. S. Army. 



A compendium of valuable information gathered from many sources at home and 

 abroad. A noteworthy feature is the series of army regulation blanks properly filled out 

 to show exactly how this work must be done. 



With 30 Illustrations, many Specimen Forms, Reference Tables, 

 Appendix. 8vo. Cloth, S5.00. Ready March. 



FORD— 

 Elements'of Field Hygiene and Sanitation 



By JOSEPH H. FORD, B.S M.A., M.D., Colonel Medical Corps, U. S. Army. 

 Approved for Publication by the Surgeon General, U. S. Army. 



This book considers one of the most important subjects with which newly com- 

 missioned officers must acquaint themselves — the care of troops. It includes only 

 those points that are of proven value, employing many illustrations. 



152 Illustrations. 12mo. 255 pages. Cloth, $1.25 Postpaid. 



GREBLE— 

 Field Artilleryman's Guide 



Prepared by the Officers of the 108th Field Artillery and Edited by ^L\JOK E. St. 

 J. GREBLE, Jr. 



A pocket guide intended to serve the immediate needs of field artillerymen in the 

 Army arranged in most convenient manner and amply illustrated. Conforms to most 

 recent regulations. It includes numerous tables of value. Cloth, $1.75 Postpaid. 



P. BLAKISTON'S SON & CO., '"""^^6 



PHILADELPHIA 



