Geology and Natural History. 121 



The third section treats of superorganic evolution, including 

 such topics as mental evolution, moral evolution, and the evolu- 

 tion, mainly cultural, of man, followed by a discussion of the 

 evolution of society and the conclusion, the formula of evolution 

 and the philosophy of change. A list of works which is intended 

 merely as a first guide to the literature of each subject dealt with 

 in the work is appended. It is an interesting commentary upon 

 the lack of appreciation of the work of the modern paleontologist 

 that the four works to which one is referred under the heading 

 of paleontology are Darwin's Origin of Species, Wallace's Dar- 

 winism, Spencer's Principles of Biology, and Romanes's Darwin 

 and After Darwin, none of which should be for an instant under- 

 valued, but which nevertheless can hardly be said to sum up the 

 documentary evidence for the truth of the evolutionary doctrine 

 which is accumulating so rapidly. The glossary and index make 

 still more available and intelligible this excellent work. r. s. l. 



12. Geology and Ore Deposits of the San Francisco and Adja- 

 cent Districts, Utah ; by B. S. Butler. Pp. 212 ; 51 pis., 16 

 figs. TJ. S. G. S. Prof. Paper 80, 1913.— The rocks of this district 

 consist of sedimentary formations, lava flows, and intrusions. The 

 sedimentary rocks were deposited from Cambrian to Triassic 

 times, later being elevated and eroded. During Tertiary time 

 there occurred an extensive outpouring of lavas which are mostly 

 quartz latites. At a later period there was also an extrusion of 

 basalt rocks. The extrusion of the main bodies of lavas was fol- 

 lowed by extensive intrusions of quartz monzonites in the form of 

 stocks. The present structure of the region has been reduced 

 largely by faulting. 



The deposition of the ores of the district followed closely the 

 intrusion of the quartz monzonite. They are all of similar origin 

 but differ in character according to the rock in which they were 

 deposited. There are three general types, namely: deposits of 

 copper ores in quartz monzonite of the replacement vein type, 

 contact copper deposits in limestone and replacement fissure 

 deposits containing chiefly lead and silver in limestone; replace- 

 ment fissure lead and silver deposits in the igneous rocks. Many 

 of the deposits have undergone secondary enrichment. 



In addition to the common minerals of such deposits the fol- 

 lowing rarer species have been observed in the district : molyb- 

 denite, covellite, wurtzite in small hexagonal pyramidal crystals, 

 thaumasite, corkite, brochantite, linarite, beaverite (a new species 

 described in this Journal, xxxii, 418, 1911), jarosite, and plumbo- 

 jarosite. w. e. f. 



13. The Nickel hidustry , with Special Reference to the Sudbury 

 Region, Ontario ; by A. P. Coleman. Pp. 186; 63 pis., 14 figs., 

 9 maps. Department of Mines, Canada, 1913. — This monograph 

 describes the geology of the Sudbury region and its nickel ore 

 deposits. It includes a history of the district and detailed de- 

 scriptions of the various mines. It includes also brief descriptions 

 of the other important nickel deposits of the world. It closes 



