22 



districts north and south, and it has a range of products wide as the 

 state itself, except that citrus fruits are not commercially produced, 

 although grown by amateurs at favoring elevations and exposures. 



The Southern Coast Region. This region extends from the point 

 where the coast takes a sharp eastward turn and proceeds southward 

 to the southern boundary of the state. Its width is determined by the 

 distance of the high ridge of the Coast Eange from the ocean narrow 

 at the west, increasing toward the central part, where the San Gabriel 

 and Santa Ana valleys extend northerly and easterly to the foot of 

 Mt. San Bernardino, and then narrowing again to its southern limit 

 just below San Diego Bay. Owing to its environment and exposure, 

 as well as its latitude, this region has more heat than the more 

 northerly coast regions, though in its extensions away from the ocean 

 it has had in some places and at long intervals a brief drop in tempera- 

 ture to a degree as low as other valleys with similar elevations. It is 

 on the whole, however, most equable in its temperatures and by this 

 widely known characteristic has attracted settlement and development 

 in some respects beyond other districts of the state. The products of 

 the district are large and various, including most of the present pro- 

 duction of citrus fruits and walnuts, most of the beans, much of the 

 sugar beets and truck crops for overland shipment and dairy, poultry, 

 hay, grain, and orchard fruits for a part of its local consumption. It 

 is for the most part an irrigated district, though some crops are 

 successfuly made along the coast by rainfall. 



The Interior Valleys Region. This region extends from the north 

 end of the Sacramento Valley southward through the length of the 

 San Joaquin Valley to the Tehachapi Mountains, which form its 

 southern boundary. This pair of connected valleys constitute what 

 is properly called "The Great Valley of California," about 400 miles 

 long and from 40 to 60 miles wide. It contains a larger body of pro- 

 ductive land than any other subdivision of the state. Central on the 

 west side of the Great Valley are the deltas of the two great rivers 

 whose names designate their respective valleys. The break in the 

 Coast Range which gives outlet to their waters to the Bay of San 

 Francisco, also admits an interior extension of coast influences which 

 modify climatic conditions over these deltas and adjacent lands, as is 

 indicated by the circular intrusion of Division 2 into Division 4 as 

 shown on the map. This circular area is somewhat different in climatic 

 characters, however, from that of either of the divisions to which it is 

 related, for it is a blending of the two. 



In the extreme southeast part of the state is another area marked 

 Division 4 which is thus connected with the Great Valley because it 



