CONTENTS. 



Edmund B. Wilson : An exhibition of photographs of chromosomes, 

 with explanatory comment. 29 (285). 



T. H. Morgan : The production of two kinds of spermatozoa in phyl- 

 loxerans — functional "female producing" and rudimentary spermatozoa. 

 30 (286). 



Henry E. Crampton : Physiological problems of the geographical dis- 

 tribution of Partula in Polynesia, with demonstration of specimens. 31 

 (287). 



Edward K. Dunham : Note on the isolation of carnaubic acid from 

 beef kidneys. 32 (288). 



Frederick P. Gay : The change of corpuscle resistance in the blood 

 of immunized animals, coincident with the formation of anti-bodies. 33 

 (289). 



Cyrus W. Field : Further observations on the precipitation of inor- 

 ganic colloids by sera. 34 (290). 



Edwin J. Banzhaf and L. W. Famulener : A note on anaphylaxis. 

 35 (291). 



Robert M. Yerk.es : The relation of plasticity to sex and age in the 

 dancing mouse. 36 (292). 



Edward T. Reichert and Amos P. Brown : The crystallography of 

 hemoglobins. 37 (293). 



M. J. Rosenau and Geo. W. McCoy : The germicidal property of milk. 

 38 (294). 



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