only after careful study and comparison with 

 other books in the same field, as to content, com- 

 pleteness, originality, clarity, and "teachability" : 



If the DECISION reached from such study 

 and comparison is shown by the number of adop- 

 tions for class use which follow: 



And .... 



If the CORRECTNESS of that decision is 

 demonstrated by the continued use and a yearly 

 increase in new adoptions: 



Then, from the Record just given, the conclu- 

 sion follows that 



Menge's 



GENERAL AND PROFESSIONAL 



BIOLOGY 



is at this moment, the most OUTSTANDING 



College Textbook in the English Language ; 



And if a textbook for Secondary Schools is 

 chosen through Competitive Selection by a Com- 

 mittee of distinguished foreign scholars and edu- 

 cators as being best for the purpose for which it 

 was written, then the conclusion follows that 



Menge's 

 THE LAWS OF LIVING THINGS 

 is, at this moment, the OUTSTANDING High- 

 School textbook on Biology in any language. 



GENERAL AND PROFESSIONAL BIOLOGY 



Volume I, (General Biology) Atho-leather, 484 pages, 

 6% by 9% Price $3.S0 



Volume II, (Introductory Embryology and Compara- 

 tive Anatomy) Atho-leather, 498 pages, 

 6Va by PJ4 Pnce $4.00 



THE LAWS OF LIVING THINGS 

 Cloth, 530 pages, 5^2 by 8 Price $1.72 



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