42 Reviews — Brief Notices. 



and 50 (1912) the stratigraphy of this deposit was dealt with by 

 Messrs. Glauert, Maitland, and Montgomery. 



3. Cambrian Stratigraphy in the North American Cordillera. 

 — Mr. L. D. Burling discusses the Albertella fauna, and shows that 

 it is unassociated with Olenellus, and consists of forms either typical 

 of Middle Cambrian or confined to the Albertella fauna, as species of 

 unknown or connecting affinities. The lower Middle Cambrian 

 boundary has now been drawn at the base of such horizons as the 

 one containing the Albertella fauna. (Mus. Bull. 2, Dept. of Mines, 

 Canada, 1914.) 



4. Geology of Long Island. — An elaborate and detailed description 

 of the geology of Long Island is provided by M. L. Fuller as Pro- 

 fessional Paper 82, Department of Interior, United States Geological 

 Survey, 1914. The paper is fully illustrated by sections and topo- 

 graphic maps. As there is a large amount of Quaternary and Glacial 

 deposit on the island, the work may be studied with profit by many 

 English geologists quite apart from its general interests in a strati- 

 graphical direction. 



5. Transportation of Debris by Running Water. — G. K. Gilbert 

 and E. C. Murphy, in dealing with the subject of transportation by 

 running water, discuss the apparatus employed, adjustment of 

 observations, relation of capacity to slope, relation of capacity to form 

 ratio, of capacity to discharge, to fineness of debris, to velocity, to 

 depth; experiments with mixed grades, with crooked channels, flume 

 traction, natural streams, rhythm. (Professional Paper 86, Depart- 

 ment of Interior, United States Geological Survey, 1914.) 



6. Note on the Temperature in the Deep Boring at Eindlay, 

 Ohio. By John Johnson. Amer. Journ. Science, vol. xxxvi, 

 pp. 131, 1913. 



The temperatures of the borehole were measured by maximum 

 reading thermometers, three thermometers in a copper cage being 

 used for each measurement. The total depth of the boring was 

 2,980 feet, and throughout the lower 2,000 feet the gradient was 

 determined to be practically uniform, viz. 0-41° C. (0*74° F.) per 

 100 feet. Gas flows through the rocks down to a depth of 770 feet, 

 and, as might be^expected, the expansion of this gas when it reaches 

 the borehole results in cooling. Consequently the temperatures 

 measured down to that depth are uniformly too low, being those of 

 the expanding gas, and not those of the adjacent rocks. 



7. The Grand Gulch Mining Region, Mohave County, Arizona. 

 By James M. Hill. United States Geological Survey, Bulletin 

 580-D. pp. 58. Washington, 1914. 



The copper-ore bodies occur around the side of a vertical mass of 

 sedimentary rocks lying within a series of stratified rocks. The 

 original sulphides have .been largely converted into carbonates. The 

 metals appear to have been brought to their present position by 

 generally downward moving waters, which were probably cold, since 

 no hydrothermal alteration of the wall rocks in the vicinity was 

 noticed. 



