44 Reviews — Dana's Manual of Geology. 



BE "V I IE "W S. 



I. — Manual of Geology : Treating of the Principles of the Science 

 with special reference to American Geological History. By 

 James D. Dana, Silliman Professor of Geology and Mineralogy 

 in Yale College, Foreign Member and Wollaston Gold Medallist 

 of the Geological Society of London. Illustrated by over eleven, 

 hundred figures and a chart of the world. Second Edition, 

 1874. 8vo. pp. 828. (New York : Ivison, Blakeman, Taylor, 

 and Co. London : Triibner and Co.) 



THE name of Professor Dana, as a zoologist, a geologist, and a 

 mineralogist, is known and honoured, not only in America, but 

 throughout Europe. He occupies in the United States the same 

 relation to the student of geological science that Lyell has so long 

 maintained in England. He is the most celebrated teacher in 

 America, and his books are adopted wherever geology and minera- 

 logy are taught. 



Nearly fifteen years have elapsed since the first edition of this 

 manual appeared, during which time geological progress (especially 

 in the United States) has been very considerable. Since November, 

 1862 (when the first edition of this work was really completed), the 

 Surveys of California, the Territoi'ies over the summit and slopes of 

 the Eocky Mountains, those of Minnesota, Iowa, Missouri, Louisiana, 

 Tennessee, Illinois, Indiana, Michigan, Ohio, North Carolina, and 

 New Hampshire, in the United States, and the Provinces of Canada, 

 New Brunswick, Nova Scotia, and Newfoundland, have been carried 

 out and their Eeports published. These Surveys have greatly 

 extended our knowledge of American rocks and mineral products, 

 besides affording aid towards a deeper insight into principles and 

 a clearer comprehension of the system that pervades the earth's 

 structure. 



Besides all this, large contributions to palaeontology have been 

 made by some of the Keports, and most prominently by the new 

 volume of the New York series by James Hall ; the volumes of the 

 Illinois Survey by Meek, Worthen, Newberry, and Lesquereux ; of 

 the Ohio Survey by Newberry and Meek ; of the California Survey 

 under J. D. Whitney, by Meek and Gabb ; of the Survey of the 

 Territories under F. V. Hay den, by Meek, Cope, Leidy, and Les- 

 quereux; and of Canada under Sir William E. Logan, F.R.S., by 

 Billings, Dawson, and Hall. 



Since the year 1862, through Scudder, we have our first know- 

 ledge of the insect-life of the Devonian period ; through Leidy, 

 Cope, and Marsh we have seen the meagre list of American Creta- 

 ceous reptiles enlarged, until it exceeds that from all the world 

 besides ; and through the same geologists, not only has the mam- 

 malian fauna of the American Miocene received additions of many 

 species, but the stranger fauna of the Rocky Mountain Eocene has 

 been first made known. Through Marsh, also, the first American 

 Cretaceous birds have been named, and the announcement has come 



