Vol. VI. March, 1907. 
BU ie Pern 
OF THE 
Southern Calitorniz Academy of Sciences 
Committee on Publication: 
M. Dozier A. Davidson, C. M., M. D. 
CONTENDS 
On Some Ground-Dwelling Arachnida 
The Changes in Our Weeds 
Squaring the Circle 
The Length of Jupiter’s Day 
The Cycle Theory of Disturbances 
Proceedings of the Academy 
Section Meetings 
PUBLISHED 
AT 116 NORTH BROADWAY 
BY THE ACADEMY, QUARTERLY. 
AeyB: Ulrey 
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MAILED MAR. 30, 1907 
