At a meeting of this Academy, held on the 21st of October, 

 1867,* Prof. Whitney exhibited some photographs and stereographs, 

 taken for the Geological Survey by Mr. W. Harris, in the Upper 

 Tuolumne Valley, near Soda Springs, Mount Dana, Mount Hoff- 

 mann, and Mount Lyell. He also presented an account of a remark- 

 able portion of the Tuolumne Valley (Hetch-Hetchy Valley), which 

 forms almost an exact counterpart of the Yosemite, written by Mr. 

 C. F. Hoffmann, the head of a party of the Geological Survey, by 

 which it was explored the previous summer. 



* Vide Proc. Cal. Acad. Sci., vol. Ill, page 368 ; see also San Francisco Evening Bulletin of 

 October 22d, 1867. 



