SCIENCE 



NBW SBBtES 



VOL.XXXVni. No. 989 



Friday, December 12, 1913 



Single Copies, 16 Gtb. 

 Annual Stjbsoeiption, $5.00 



•THE FOLLOWING ARE SOME OF BL-AKISTON'S NEW BOOKS; 

 THE KIND YOU OPEN WITH GREAT EXPECTATION, AND 

 READ THROUGH TO THE END WITH DELIGHT AND PROFIT. 



Duff and Ewell's 



Physical Measurements 



3rd Edition. 80 Illustrations. 

 Cloth, $1.50 Postpaid. 



A Laboratory Manual by A. 

 WiLMEB Duff, A.M., Sc.D., and 

 Arthur W. Ewell, Ph.D., jdi 

 +242 pages. In this edition, 

 numerous improvements have 

 been made in the descriptions of 

 apparatus and methods. 



Folsom's Entomology 



2nd Edition. 308 Illustrations. 



Cloth, S2.25 Postpaid. 



Entomology with Special Re- 

 ference to Its Biological and Eco- 

 nomical Aspects. By Justus 

 Watson Folsom, Sc.D. (Har- 

 vard). Assistant Professor of 

 Entomology at the University of 

 Illinois. Revised. 8vo;viiH-420 

 pages. 



Gould and Pyle's Pocket 



Cyclopedia of Medicine 



and Surgery 



2nd Edition. $1.00 Postpaid. 

 Thumb Indexed $1.25. 



Revised by R. J. E. Scott, 

 M.D., New York. With many 

 practical Tables, Prescriptions, 

 Formulae and Illustrations. Thin 

 64mo ; 728 pages. Full Limp 

 Morocco, GUt Edges, Rounded 

 Corners. 



Lewis and Stohr's Histology 2nd Edition 



495 Illustrations, 51 in colors. $3.00 Postpaid. 

 By Dr. Frederic T. Lewis (Harvard University) and Dr. Philipp Stohr (Wurzburg) . A thor- 

 oughly revised and greatly improved edition with 45 new illustrations. Many of the former illustra- 

 tions have been redrawn for this edition. 105 more pages than previous edition. Cloth, xi +539 pages. 



Minot's Modern Problems of Biology 



53 Illustrations. Cloth, $1.25 Postpaid. 

 Lectures delivered at the University of Jena by Charles S. Minot,S.D., LL.D., Harvard Univer- 

 sity. (Exchange Professor with University of Jena.) The new achievements of biology are signifi- 

 cant; this book makes clear some of the fundamental conclusions. 



Quantitative Analysis 

 in Practice 



Cloth, $1.25 Postpaid. 



By John Waddell, B.A., 

 Ph.D. With an appendix of 

 tables, logarithms, etc. 



The directions for the carrying 

 out of the different operations 

 are fuU and explicit. 



The Microtomist's Vade 

 Mecum 



7th Edition. Cloth, $4.00 Post- 

 paid. 



By Arthur Bolles Lee. 

 Thoroughly revised and rear- 

 ranged, contains 929 articles in- 

 cluding about 700 new entries. 

 Octavo. 



Experiments in General 



Chemistry 



Shorter Course. Cloth, $.60 

 Postpaid. Illustrated. 



By Edgar F. Smith, M.A., 

 Ph.D., Sc.D., Prof essor of Chem- 

 i8try,University of Pennsylvania, 

 and Dr. H. F. Keller, Professor 

 of Chemistry, Philadelphia High 

 School. 



Publishers 



P. BLAKISTON'S SON & CO., Philadelphia 



