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Variations ol Sierra glaciers. (Sierra Club Bull., vol. 5, pp. 20-25 
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GILPIN, EDWARD. 
Sections and analyses of Nova Scotia coals. (Ti-ans. N. S. Inst. 
Sci., vol. 11, pp. 8-17. 1903.) 
GIRTY, GEO. H. 
The Caiboniferous formations and faunas of Colorado. Prof. 
Pup. 16, U. S. G. S., pp. 546, pis. 10. 1903. 
GRABAU, A. W. 
On the classification of sedimentary rocks. (Am. Geol., vol. 33, 
p. 228. Apr., 1904.) 
GRIFFITH, Wm. 
A Missouri coal field. (Eng. & Min. Jour., vol. 77, p. 564. Apr. 
7, 1904.) 
HAANEL, EUGENE. 
On the location and examination of magnetic ore deposits by 
magnetometric ineasureinents, 132 pages, 11 plates. Dept. of the 
Interior, Ottawa. 
HERSHEY, O. H 
The Bragdon formation in northwestern California. (Am. Geol., 
vol. 33, p. 248. April, 1904, continued.) 
HILL, R. T. 
The Guanajuato mining district. (Eng. Min. Jour., vol. 77, p. 599. 
Apr. 14, 1904.) 
HOVEY E. O. 
The crystal cave of South Dakota. (Sci. American, Suppleinent. 
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HUBBARD, G. D. 
An inter-glacial valley in Illinois. (Jour. Geol.. vol. 12, pp. 152- 
160, Feb.-Mar., 1904. 
IDDINGS, J. P. 
A fracture valley system. (Jour. Geol., vol. 12, pp. 94-105. Feb.- 
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IRVING, J D. 
Microscopic structure and origin of certain stylolitic structures 
in limestone. (Am. Geol., vol. 33, p. 266, Apr., 1904.) 
JAGGAR, T. A. JR. 
The eruption of Mont Pelee, 1851. (Am. Nat., vol. 38. pp. 51-87, 
Jan., 1904. Translated from the French.) 
JULIEN, A. A. 
The occlusion of igneous rocks within metamorphic schists. (Am. 
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LANE, ALFRED C. 
The role of possible Eutectics in lock magmas. (Jour. Geol., 
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LE CONTE, J. N. 
The ascejit of the North Palisades. (Sierra ("luh HmII.. vol. 5. 
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Description of the Nampa Quadr.mgle. Nampa Folio No. 103, 
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