372 



TRANSACTIONS OF THE 



Map No. 2 — Mean Animal Temperature. 



Note. — Localities referred to in these tables are designated by numbers in circles, as 

 follows: 1, Redding; 2, Red Bluff"; 3, Chico (Oroville is situated southeast of Chico, in the 

 same county); 4, Sacramento; 5, Fresno; G, San Jose; 7, Los Angeles; 8, Riverside; 0, San 

 Diego. 



Lines of Minimum Temperature. 



The map — No. 3 — showing the distribution of the lines of minimum 

 temperature, includes the Sacramento and San Joaquin Valleys in one 

 comprehensive division, marked " 20 to 30," and an extension of the same 

 lines incloses the region in which Riverside, San Bernardino County, is sit- 

 uated. Riverside is the most noted orange producing colony of Southern 

 California, and the fact is that its Winter climate is practically the same 

 as that of the Sacramento Basin, which includes the foothills of the two 

 great mountain ranges. It should be understood that the 20° F. on the 

 map stands for the very lowest temperature recorded, and by no means 

 indicates the lowest point to which the mercury may be expected to fall 

 each Winter. As a matter of fact, the thermometer rarely indicates a freez- 



