The University of CJiicago Science Series 



'X'HE purpose of this important new series is 

 -^ to enable the investigator to present the re- 

 sults of his special researches, not only to a wider 

 public but to his scientific colleagues, in a more 

 attractive and accessible form than that of scat- 

 tered contributions in technical journals. 



The First Published Volume of the Series 



The Evolution of Sex in Plants. By John 

 Merle Coulter, Head of the Department 

 of Botany. viii-Fi4o pages, small i2mo, 

 cloth; $i.oo, postage extra (weight 14 oz.). 



Volumes in Preparation for Early 



Publication 



The Origin of the Earth. By Thomas C. Cham- 

 BERLIN, Head of the Department of Geology. 



The Isolation and Measurement of the Electron. 



By Robert Andrews Millikan, Professor of 

 Physics. 

 Finite CoUineation Groups. By Hans F. Blich- 

 FELDT, Professor of Mathematics in Leland 

 Stanford Junior University. 



The Problem of Individuality in Organisms. By 



Charles Manning Child, Associate Professor 

 of Zoology. 

 Chemical Signs of Life. By Shiro TAsmEO, In- 

 structor in Physiological Chemistry. 



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ROYQ' C\ TTRQ ByCHARLESS.BERNHEIMER.PH.D 



Ij " p ^ \J 1^1 1^^ ^*'S^ Superintendent, Hebrew Educational 



Society, Brooklyn 



An authoritative textbook for club leaders and members, recreation and social 

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and JACOB M. COHEN, A.B., LL.M. 



Club Director, Recreation Center 2o, 

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Outline 

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vn 

 vni 



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 The Gymnasium and Play- 

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(b) Minutes 



(c) Names of Clubs 



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(e) Cheers 



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