SCIENCE— ADVERTISEMENTS 



Blakiston's Page 



Noteworthy Textbooks and Reference Works 



The Principles of Physics 



By Willis E. Tower, Englewood High School, 

 Chaelbs H. Smith, Hyde Park High School, and 

 Charles M. Turton, Bowen High School, Chicago. 

 432 Illus. 12mo, 466 Pages. Cloth, $1.25 Post- 

 paid. 



"All teachers of the subject will find in this book 

 all the standard good things and much that is new 

 both in matter and manner. There are 432 illus- 

 trations, and these all clarify and reinforce the 

 text." — Ohio Educational Monthly. 



The Source, Chemistry and 

 Use of Food Products 



By Prof.' E. H. S. Bailey, University of Kansas. 

 75 Illus. 12mo. 517 Pages. Cloth, $1.60 Post- 

 paid. 



" In this volume the general principles are treat- 

 ed in such a way that the reader may have a prac- 

 tical knowledge as to what constitutes a good food 

 and where it is obtained." 



— Medical Record, New York. 



A Textbook of Physics 



By Various Writers. Edited by Prof. A. Wilmeb 

 Ddfp, Worcester Polytechnic Institute. 3rd Ed. 

 595 Illus. 686 Pages. Cloth, $2.75 Postpaid. 



List of Sections and Authors. 

 Mechanics. By A. Wilmeb Ddtt, A.M., Sc.D. 

 Wave Motion. By E. Pekcival Lewis, B.S., Ph.D., 



University of California. 

 Heat. By Chaeles E. Mendenhall, Ph.D., University 



of Wisconsin. 

 Electhioitt and Magnetism. By Albebt P. Cabman, 



A.M., Sc.D., University of Illinois. 

 Radio-Activitt. By R. K. McCLtTNG, A.M., Sc.D., 



F.R.C.S., University of Manitoba. 

 Sound. By William Hallock, Ph.D., Columbia Univer- 

 sity, New York. 

 Light. By E. Peecival Lewis, B.S., Ph.D., University 



of California. 



Introduction to Organic 

 Chemistry 



By Prof. John T. Stoddard, Smith College, 

 Northampton, Mass. 12mo. ix-f-419 Pages. 

 Cloth, $1.50 Postpaid. 



" The subject is presented simply, directly and 

 connectedly, so that the student may gain a clear 

 idea of the principles of organic chemistry and its 

 relations to general chemistry." — From the Preface. 



NIPHER. Experimental Studies in Electricity and Magnetism 



Researches on the Nature of Electric Discharge and the Cause of Local Magnetic Storms. Illustrated. 

 By Professor Francis E. Nipher, Washington University, St. Louis. 39 Illustrations. Octavo. Cloth, 

 $1.25 Postpaid. 



CROWTHER. Molecular Physics 



By J. A. Crowther, M.A., Cambridge, England. Illustrated. 12mo. Cloth, $1.25 Postpaid. 



PICKARD. Modern Steel Analysis 



A selection of Practical Methods for Chemical Analysis of Steel. By J. A. Pickard, B.Sc, Carnegie 

 Research Scholar, London. Cloth, $1.25 Postpaid. 



HALE. Synthetic Use of Metals in Organic Chemistry 



By Arthur J. Hale, B.Sc, City and Guilds Technical College, London. 12mo. Cloth, $1.50 Postpaid. 



P. BLAKISTON'S SON & CO., Publishers 



1012 Walnut Street PHILADELPHIA 



