OYSTER RESOURCES OF THE PACIFIC COAST. 347 



Tahle of lioiirh/ vhaugcs of surface -\ca1er iempcroi ttre in parts of San Fraiuisco Bay. 

 [Reduct'd to inoiitlily means.] 



A series of temperatures taken in Oakland Creek from September 7, 

 1890, to May 20, 1S91, at 4 a. m. daily, range from 49.8° for December to 

 G4.9^ for September. The temperatures are here reduced to means of 

 ten days. 



Temperaiure of ilie waicr at the surface in Oakland Creek, San Francisco Baij, from 

 September 'l, 1890, to Ma\j 20, ISDl. 



[Taken l)y Coast Survey steamer McArthur, Lieut. "W. P. Hay, U. S. N., commanding.] 



