28 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, [bull. 203. 
169 Crosby (W. O.). [Reviews of " Granites of southern Rhode Island 
and Connecticut, with observations on Atlantic Coast gran- 
ites in general" by J. F. Kemp; " Contact metamorphism 
of a basic igneous rock" by IT. S. Grant; "Suggestions 
regarding the classification of the igneous rocks" by W. H. 
Hobbs; "The nomenclature of feldspathic granolites" by 
H. W. Turner; and "Some contact phenomena of the Pal- 
isade diabase" by J. D. Irving.] 
Am. Geol., vol. 27, pp. 51-54, 1901. 
170 - [Reviews of "A brief review of the titaniferous magnetites" 
by J. F. Kemp; "The origin of kaolin" by H. Ries; "Igne- 
ous complex of Magnet Cove, Arkansas" by H. S. Wash- 
ington; "A granite-gneiss area in central Connecticut" by 
L. G. Westgate; and "The origin of nitrates in cavern 
earths" by W. H. Hess.] 
Am. Geol., vol. 27, pp. 119-122, 1901. 
171 [Review of "The calcareous concretions of Kettle Point, 
Lambton County, Ontario," by R. A. Daly; and "The 
granite rocks of the Pikes Peak quadrangle" by E. B. 
Mathews.] 
Am. Geol., vol. 27, pp. 253-254, L901. 
172 — [Review of "Some principles of rock analysis" by W. F. 
Hillebrand; and "Analyses of rocks. Laboratory of the 
U. S. Geological Survey" by F. W. Clarke.] 
Am. Geol., vol. 27, pp. 315-316, 1901. 
173 Are the amygdaloidal melaphyrs of the Boston Basin intru- 
sive or contemporaneous? 
Am. Geol., vol. 27, pp. 324-327, 1901. 
Reviews a paper by Henry T. Burr. 
174 — - The tripolite deposits of Fitzgerald Lake, near St. John, 
New Brunswick. 
Tech. Quart., vol. 14, pp. 124-127, 1901. 
Describes the character and origin of the deposit. 
175 - - Geological history of the hematite iron ores of the Antwerp 
and Fowler belt in New York. 
Tech. Quart., vol. 14, pp, 162-170, figs. 1-4, 1901. 
Describes the character, occurrence, and origin of the hematite ores of 
the region. 
176 Cross (Whitman), assisted by Arthur Coe Spencer. General geol- 
ogy, La Plata Folio — Colorado. 
IT. S. Geol. Surv., Geol. Atlas of U. S., Folio No. 60, 1899. 
Describes the geographic and physiographic features, the character 
and occurrence of the Juratrias, Cretaceous, Eocene, and Pleistocene 
strata and igneous rocks, and the geological structure. Includes a state- 
ment of the general geologic problems of the region. 
