febks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1904. 113 
Jtanton (T. W.). 
Note on the Cretaceous fossils [of the Bisbee quadrangle, Arizona]. 
U. S. Geol. Surv., Professional Paper do. 21, p. 7C, 1 pi., 1904. 
Gives a list of species identified and notes on their occurrence. A few of the 
more characteristic are figured. 
See Hatcher (J. B.), 1. 
►terrett (Douglas B.). 
. Tourmaline from San Diego County, California. 
Am. Jour. Sci., 4th ser., vol. 17, pp. 459-465, 1 pi., 12 figs. 
Describes crystal lographic features of this mineral. 
A new type of calcite from the Joplin mining district. 
Am. Jour. Sci., 4th ser., vol. IS, pp. 73-76, 8 figs., 1904. 
Describes the occurrence and crystallographic characters. 
terrett (Douglass B.), Pratt (Joseph Hyde) and. 
The tin deposits of the Carolinas. 
See Pratt (J. H.) and Sterrett (D. B.), 1. 
itevens (Blarney). 
I On the differentiation of igneous magmas and formation of ores. 
Eng. & Mg. Jour., vol. 77, pp. 71-72, 1904. 
i Acidic magmas, their exhalations and residues 
Eng. & Mg. Jour., vol. 77, p. 351, 1904. 
ttevenson (John J.). 
i Carboniferous of the Appalachian basin. 
Geol. Soc. Am., Bull., vol. 15, pp. 37-210, 1904. 
Describes in detail the distribution, character, and geologic relations of the 
various beds of the Pottsville of the Pennsylvanian series in the Appalachian 
region, giving numerous detailed sections, and discusses their nomenclature 
and correlation. 
i Memoir of J. Peter Lesley. 
Geol. Soc. Am., Bull., vol. 15, pp. 532-541, 1 pi. (port.), 1904. 
Includes a list of his published writings. 
;evenson (Robert). 
I The deposition of ores from an igneous magma. 
Eng. & Mg. Jour., vol. 77, pp. 272-273, 1904. 
I The deposition of ores from an igneous magma. 
Eng. & Mg. Jour., vol. 77, pp. 472-474, 4 figs., 1904. 
Illustrates the formation of an igneous magma by an example based upon 
geologic structure in Alaska. 
pne (Ralph W.). 
The Elders Ridge coal field, Pennsylvania. 
U. S. Geol. Surv., Bull. no. 225, pp. 311-324, 1904. 
Describes location and geologic structure of the field and the occurrence and 
character of the coals. 
Bull. 271—05 8 
