RECORDS OF MEETINGS OF 1906 281 



SECTION OF BIOLOGY. 

 April 2, 1906. 



Section met at 8: 15 P. M.. President Britton presiding. In the absence 

 of the secretary, Mr. Roy W. Miner -was appointed secretarv pro tern. 



The minutes of the last meeting of the Section "were read and approved. 

 The following program was then offered : 



C. Stuart Gager, A New Factoe es' Plant Exylroxment. 



Bashford Dean, Zoological Notes Collected in Japan ant) India. 



SlTMMAET OF PaPEES. 



Dr. Gager gave a brief historical resume of the discovery and nature 

 of radioactivity, and reviewed the researches which indicate that radio- 

 activity is very widely distributed in nature, and is very probably a general 

 property of matter, and therefore a factor in the normal enviroim3ent of 

 plants. Various radioactive substances, and preparations for growing 

 plants tmder the influence of the radium emanation, and of the three types 

 of rays were exhibited. In conclusion several lantern slides were shown 

 illustrating experiments made by the speaker on the effect of radioactivity 

 on various physiological processes of plants. 



The meeting then adjourned. 



Rot W. Mlvee, 

 Secretary pro iem. 



SECTION OF GEOLOGY AND :MINERAL0GY. 

 April 9, 1906. 



Section met at S: 15 P. M., Dr. Julien. presiding. 



The minutes of the last meeting of the Section were read and approved. 



The following program was then offered: 



Walter Granger, The Stratigrapht of the Bridgee Bases*, Wyoming. 



(Illustrated with charts and lantern shdes.) 

 W. D. Matthew. Notes on the Pai-eontologt of the Beidgee Basin, 



Wyoming. (Illustrated with specimens and diagrams.) 

 F. J. Peck, Note on Eocysiide^, a PEiMiTm: Cystoid. 



