( Continued from page 3 of cnvrr. ) 



VOLUME 52. 



Thaxter, Rolaxd — Newor Critical Species of Chitonomyces an4 Rickia. 



pp, 1-54. June, 1916. 70c. 

 Bridgman, p. W — The Velocity of Polymorphic Changes between Sohds. 



pp 55-88. July, 1916. oOc. 

 Bridgman, P. W.— Polymorphism at High Pressures, pp. 89-18/. July, 



1916. Sl.OO. 

 Pierce, George W.— Theoretical Investigation of the Radiation Charac- 

 teristics of an Antenna, pp. 189-252. October, 1916. $1.00. 



