SOUTHERN GALTFORNIA ACADEMY OF SCIENCES 23 
Los Angeles, Cal., February 11, 1907. 
The regular Februray meeting of the Biological Section of the 
Southern California Academy of Sciences was held on Monday evening, 
February 11, 1907. 
After the regular routine of business, Mr. Fred C. Luck, a naturalist, 
whose home was for a number of years on the Island of Ceylon, was 
introduced as the speaker of the evening. Mr. Luck spoke on our 
native spiders. The lecture was most interesting, and was illustrated 
by a number of drawings made expressly for this meeting. 
A large number of members and visitors were present. 
C. H. PHINNEY, Secretary. 
The Botanical Section met in the Wileox Block February 14, 1907. 
Dr. Davidson read some notes on the ‘‘Changes in Our Weeds.’’ 
Mis. Lawrence showed a large number of plants from Arizona. 
THEODORE PAYNE, Secretary. 
The February meeting of the Astronomical Section was held on 
February 18, 1907 at the residence of Mr. B. R. Baumgardt. 
Mr. William A. Spaulding read a paper upon ‘‘ Periodicity in Terres- 
trial Disturbances Due to Cosmic Forces,’’ which was an amplification of 
his late address before the Academy in Symphony Hall, and from which 
conclusions were drawn relating to the Seismic disturbances of 1906. 
HOLDRIDGE O. COLLINS, Secretary. 
