REVIEWS 
A Note on the Geology of Gough Island. By J. H. HARVEY PIRIE. 
Notes on the Petrology of Gough Island. By R. CAMPBELL. 
(Proceedings of the Royal Physical Society of Edinburgh, ses- 
sion 1905-06; Vol. XVI, No. 6, pp. 258-66. Edinburgh, 1907.) 
This island is a peak in lat. 40° 20’ S., long. 9° 56’ W. composed of 
horizontal basalts, trachytes, trachy-dolerites, and tuffs. The island is 
encircled by wave-cut cliffs over which the streams cascade into the sea. 
C. W. W. 
Montana Coal and Lignite Deposits. By JessE PERRY Rowe. (Bulle- 
tin No. 37, University of Montana, Geological Series No. 2. 
Pp. 82, 26 plates. Missoula, Mont., 1906.) 
- Coal occurs in the Jurassic, Cretaceous, and Tertiary. The workable 
coal is limited to the Cretaceous and is both lignitic and bituminous. 
Mining is carried on to supply the local demand only, most of the coal 
being used in connection with smelting and other industries. In 1904 the 
state produced about 1,500,000 tons of coal and lignite, valued at about 
$2,450,000. The annual output of coke is about 57,000 tons. 
COWiaW: 
Geological Survey of Michigan, Annual Report, 1904. Including a 
geological map of Michigan. Pp. 182, 16 plates. Lansing, 
Mich., 1905. 
Contents: ‘Failure of Wells along the Lower Huron River, Michigan, 
in 1904,” by Myron L. Fuller; ‘‘A Geological Reconnaissance along the 
North Shores of Lake Huron and Michigan,” by Israel C. Russell; ‘‘Sixth 
Annual Report of the State Geologist,” by Alfred C. Lane. 
C. W. W. 
Towa Geological Survey (Vol. XV, Annual Report, 1904). By FRANK 
A. WILDER, State Geologist, Des Moines, 1905. 
Contains: ‘‘Statistics of Mineral Production for 1904;” ‘‘Cement and 
Cement Materials of Iowa,” by Edwin C. Eckel and H. F. Bain; and 
reports on the geology of seven counties. C. W. W. 
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