298 PROCEEDINGS OF THE CALIFORNIA 



exclusively in fragmentary forms. Bods of ashes, breccias, and volcanic grav- 

 els and conglomerates abound ; but lava flows are few and far between. This 

 is especially true of the central part of the State. Throughout the central and 

 eastern part of the Sierra Nevada, there is but one great lava flow, that of the 

 Tuolumne Table Mountain. Great as is the total quantity of volcanic material 

 in the mining counties of the Sierra Nevada, it is insignificant compared with 

 the vast accumulations that have built up the Cascade Range. 



Upon completion of this paper, Mr. Davidson named the various 

 localities on the coast where the " black sand "and auriferous grav- 

 el deposits cropped out upon the shore, and stated that in 1851 

 he had discovered the " color" in the small deposits of black sand 

 under Cape Disappointment. 



Dr. Blake referred to certain barometric anomalies observed by 

 him in the Great Basin, not sufficient in number, however, to predi- 

 cate any law pertaining thereto. 



Dr. Kellogg exhibited a young plant of the Leptosyne gigantea, 

 which had been raised in this city from specimens collected on the 

 Santa Barbara Islands, and called the attention of the Academy to 

 the many beauties displayed by this plant. 



The President stated that the Trustees had corrresponded with 

 Prof. Tyndall, in the hope to induce him to visit California, and had 

 received a reply from him to the effect that he could not visit the 

 Coast this winter, but hoped to do so at some future time. 



Regular Meeting, December 16th, 1872. 

 President in the Chair. 



Twenty-five members present. 



E. F. Northam, Prof. D. C. Oilman, and A. DeTavel, were 

 elected resident members. 



Donations to the Library : Reports of the U. S. Coast Survey 

 on the Solar Echpse of 1869. 



Donations to the Museum : Specimens of ribs and vertebra of 

 Humpbacked Whale. Fin-bone and Baleen of same ; also speci- 

 mens of Barnacles QCoromda), off of same species, by Capt. C. M. 



