iisl PALEONTOLOGY, PETROLOGY, AND MINERALOGY, li)04. 47 
dwards (W. F.). 
The new geology and vein formation. Discussion. 
Colo. Sci. Soc, Proc, vol. 7, pp. 289-296, 1904. 
Describes the history of the nebular hypothesis and discusses the relative 
merits of this and the planetesimal hypothesis. 
ggleston (Julius Wooster). 
Physiography — an outline of its scope and applications. 
Colo. Sch. Mines, Bull., vol. 2, no. 3, pp. 96-110, 1904. 
Describes physiographic areas of the United States and various local physio- 
graphic features as illustrative of principles set forth in the paper. 
merson (Benjamin Kendall). 
General geology. Notes on the stratigraphy and igneous rocks [of 
Alaska]. 
Harriman Alaska Expedition, vol. 4, pp. 11-56, 5 pis., 13 figs., 1904. 
Describes the geology of points visited by the Harriman Alaska expedition, 
including the occurrence and character of igneous, metamorphic, and sedi- 
mentary rocks in Alaska, the petrographic characters of various rocks col- 
lected, and the age and correlation of fossil-bearing formations. 
3 Note on a calcite-prehnite cement rock in the tuff of the Holyoke 
Range. 
Am. Jour. Sci., 4th ser., vol. 17, pp. 277-278, 1904. 
Describes the character and occurrence of this rock. 
Imerson (Benjamin Kendall), Loomis (F. B.) and. 
Q On Stegomus longipes, a new reptile from the Triassic sandstones 
of the Connecticut Valley. 
Am. Jour. Sci., 4th ser., vol. 17, pp. 377-380, 1 pi., 1904. 
ipierson (Philip). 
Q Note on glacial topography in central New Hampshire. 
Appalachia, vol. 10, pp. 299-303, 1904. 
Describes physiographic features in central New Hampshire. 
Immons (S. F.). 
'. Theories of ore deposition historically considered. 
Geol. Soc. Am., Bull., vol. 15, pp. 1-28, 1904. Eng. & Mg. Jour., vol. 77, pp. 
117-119, 157-159, 199-200, 237-238, 1904. New Zealand Mines Record, vol. 
7, pp. 384-387, 426-429, 1904. 
Reviews in chronologic order the various theories held at different periods of 
time regarding the origin of ore deposits. 
The Viro-inius mine. 
Eng. & Mg. Jour., vol. 77, p. 311, 1 fig., 1904. 
Gives observations upon the occurrence and geologic relations of the ore bodies 
of copper and galena. 
Investigation of metalliferous ores. 
U. S. Geol. Surv., Bull. no. 225, pp. 18-24, 1904. 
Gives a short summary statement respecting the economic publications of the 
preceding year relating to metalliferous ores and the field work carried on 
in this division. 
