Publications of Scientific Societies. 85 



Mercury associated with bitumen; by T. Egleston. Trans. 

 Am. Inst. Mining Eng., vol. 3, 1875, p. 273. 



The late operations on the IMariposa estate; by C. M. Rolker. 

 Trans. Am. Inst. Mining Eng., vol. 5, 1877, pp. 584-606, 

 plates. 



Hydraulic mining in California; by A. J. Bowie, Jr. Trans. 

 Am. Inst. Mining Eng., vol. 6, 1878, p. 27. 

 Contains map of riv*^r tunnel on Mariposa estate. 



Geology of American Valley. Trans. Am. Inst. Mining Eng., 

 vol. 13, 1885, p. 217. 



Mining developments on the northwestern Pacific Coast, and 

 their wider bearing: by Amos Bowman. Trans. Am. 

 Inst. Mining Eng., vol. 15, 1887, pp. 707-717. 



The silver mines of Calico, California; by W. Lindgren. 



Trans. Am. Inst. Mining Eng., vol. 15, 1887, p. 717-734. 



Description and sections of the region, and discussion of the litho- 

 logical, stratigraphic, and structural features of the Tertiarj- sand- 

 stones, tuif deposits, liparite, and andesite, and their relations to the 

 ore deposits. 



Notes on certain water-worn vein specimens. Trans. Am. Inst. 

 Mining Eng., vol. 25, 1896, pp. 514-518. 



Glacial erosion and origin of the Yosemite Valley ; by William 

 P. Blake. Trans. Am. Inst. Mining Eng., 1899. 



AMERICAN JOURNAL OF CONCHOLOGY. 



Published in Philadelphia. 

 Vol. 1, 18G5— Vol. 7, 1871. 



Observations on certain Eocene fossils described as Cretaceous 

 by Mr. W. ]\I. Gabb in his report published in the Palaeon- 

 tology of California ; by T. A. Conrad. Am. Jour. Conch., 

 vol. 1, 1865, pp. 362-365. 



The author remarks that Mr. Gabb makes two divisions of his 

 Cretaceous strata, A and B. The former is, doubtless. Cretaceous ; 

 and the latter, I am sure, will prove to be older Eocene. Fusus 

 Californicns, Gabb, the author does not recognize as "my? Clavatula 



