SCIENCE— ADVERTISEMENTS 



THE OESTROUS CYCLE 

 IN THE RAT 



And Its Associated Phenomena 



By 



Long and Evans 



148 pages, II plates, 7 figures in text; paper, $3.75 



The profound importance of an infallible 

 method of detecting in the Mammalia the periodic 

 function of the ovary, and the possibility, through 

 the possession of such a method, of the investiga- 

 tion of disturbances of the ovarian function are 

 matters of interest to students of the subject. 

 Before proceeding to such investigation, it would 

 be necessary to establish clearly all the charac- 

 teristics of what has been called the normal 

 oestrous or reproductive cycle in the animal chosen 

 for investigation. To that task the present mono- 

 graph is devoted. 



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