B 



PREFACE. 



THE papers which form this little volume are 

 simply the brief records of facts of interest brought 

 to light in the course of physiological study. 



The constant aim of the writers has been to 

 present these facts with the greatest conciseness 

 compatible with scientific accuracy. 



Judgment upon this and other qualities is, how- 

 ever, left to the friendly reader by 



THE EDITORS. 



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