56 A Bibliography of the Geology, etc., of California. 



On origin of bitumen; by S. F. Peckham. Am. Jour. Sci., Sd 

 ser., Vol. 28, 1884, pp. 105-117. 



Cretaceous metamorphic rocks of California; by George F. 

 Becker. Am. Jour. Sci., 3d ser.. Vol. 31, 1886, pp. 348- 

 357. . 



A Post Tertiary elevation of the Sierra Nevada, sliown by the 

 river-beds; by Joseph Le Conte. Am. Jour. Sci., 3d ser., 

 Vol. 32, 1886, pp. 167-181. 



Notes on the geology of Northern California; by J. S. Diller. 

 (Abstract of paper from the Proc. Phil. Soc. of Wash- 

 ington.) Am. Jour. Sci., 3d ser.. Vol. 33, 1887, pp. 

 "152-153. 



The latest volcanic eruption in Northern California, and its 

 peculiar lava; by J. S. Diller. Am. Jour. Sci., 3d ser., 

 Vol. 33, 1887, pp. 45-50. 



The texture of massive rocks; by George F. Becker. Am. Jour. 

 Sci., 3d ser.. Vol. 33, 1887, pp. 50-58. (Abstract from 

 Popular Science Monthly, Vol. 31, 1887, pp. 425-426.) 



Discusses the relation of texture in igneous rocks to the conditions 

 under which they were cooled, etc. The author also restates his con- 

 clusions in regard to the disputed age and relations of the Washoe 

 rocks. 



The flora of the coast islands of California, in relation to 

 recent changes of physical geography; by Joseph Le 

 Conte. Am. Jour. Sci., 3d ser., Vol. 34, 1887, pp. 457-460. 

 See also, Cal. Acad. Sci. Bull., Vol. 2, 1887, pp. 515-520; 

 Am. Geol., Vol. 1, 1888, pp. 76-81; Nature, Vol. 37, 1887, 

 p. 358. 



A discussion of the Post Tertiary physical changes of the coast 

 region of California, as indicated by the flora and fauna of the coast 

 islands. 



On the occurrence of Hanksite in California; by Henry (i. 

 Hanks. Am. Jour. Sci., 3d ser., Vol. 37, 1889, pp. 63-66. 



