Geology and Mineralogy. 



483 



9. Die Vomoelt unci Hire Fntwickelungsgeschichte ; by Ernst 

 Koken, pp. 654, 1893. — Professor Koken has produced an elabo- 

 rate treatise on the development of the earth and its inhabitants, 

 beginning with a discussion of the interior condition of the earth 

 and of the crust, devoting a chapter to mountain building, 

 another to estimates and notions of time in geology, and in the 

 remainder of the book elaborating step by step the development 

 of the formations, by deposition, growth of continents by earth 

 movements, and by surface shaping up to the present condition 

 of the earth. Under each system is added a general review of 

 the history of organisms for the period discussed as faunas and 

 floras, the species being named but not described, with account ot 

 their distribution and relations to other faunas and floras and to 

 those which have preceded and succeeded them. A great amount 

 of information is brought together about geology and paleontol- 

 ogy, carefully arranged in a systematic manner, with running 

 commentary by the author. 



Correction.— In the paper entitled "Further Studies of the 

 Drainage Features of the Upper Ohio Basin " in the April num- 

 ber of this Journal, a serious error occurs in figure 5, page 282, 

 which the authors desire to correct. In the second column of the 

 diagram, which represents interglacial excavation, the unit of 

 filling was employed in draughting, instead of the unit of excava- 

 tion, thus doubling the amount, since it happens that the valley- 

 filling of late glacial gravels was just about twice the volume of 

 the postglacial erosion. The error crept in during the re-drawing 

 and reduction of the diagram for the Journal, and escaped detec- 

 tion until some time after publication. It did not appear in the 

 original diagram used at the Boston meeting of the Geological 

 Society of America, nor in the computation of the authors. The 

 diagram is herewith repi*oduced in the corrected form. 



DIAGRAM OF 



Ra tios of Work. 



HYP. 1. 



Hrall. 



HYP.lll 



First Glacial 



(Filling 



Inter glavial 



{Excauation ) 

 Gr'avel. Roc/,. Cols. 



Last 

 Glacial. 



(FiUing) 



Post- 

 glacial. 



(Cnauahon) 



■■ 



a 





■ 

 ■ 

 ■ 



D 

 D 

 □ 



KXXXX A 



1 A 



EEI A 



^B 



1 



na 





1 1 





First 

 Glacial. 



{Filling) 



First 

 Inter glacial, 



(€xca.uation) 

 Gravel. Rock. Cols. 



Second 

 Glacial. 



[Filling) 



Second 



Inter glacial. 



(Excavation) 



Grauel. Rock. Cols. 



LAST 



Glacial 



{Filling) 



Post- 

 glacial. 



(Fxc.) 



Hyp. IV. 



■■ 



CD KEi A 



X 



X-Y E2 a 



■ 



D 



T. C. Chaubeklin. 



III. Miscellaneous Scientific Intelligence. 



1. Watson Gold Medal of the National Academy of Sciences. 

 — This medal, which was awarded 1888, April 19, to Dr. Edward 

 Schoenfeld of Bonn, and which was conferred 1891, April 22, 



