Editorial. 



From the preliminary list of papers sent out by the Secretary of 

 the Geological Society of America, it would appear that an unusually 

 interesting meeting may be expected at Washington during the com- 

 ing holidays. The presidential address by Dr. Le Conte on "The 

 Different Kinds of Earth-Crust Movements and Their Causes" will 

 undoubtedly contain much of interest as the mature result of his long 

 thought on the dynamics of the crust, and this will be expressed in his 

 usual felicitous style. 



It is always interesting to note the distribution of the subjects of the 

 papers of so representative a body. Of the forty-two titles announced 

 in the preliminary list, nine may be grouped under the head of areal 

 or local phenomena ; nine under the head of physiographic geology, 

 a part of which are discussions of principles and a part of phenom- 

 ena ; eight under glaciology ; four under genesis ; two under chro- 

 nology ; two under chemical geology ; one under palaeontology, and 

 one under correlation. This grouping is not, of course, exact, since 

 many of the papers admit of classification under different heads. 

 There is a notable scantiness of papers on petrography, which has 

 usually been so prominent a feature of the Society programme. 

 Doubtless this will be changed in the final list. As a whole, the 

 synopses of the papers indicate matter of more than usual importance, 

 and show a gratifying activity on the part of the members of the 

 Society. T. C. C. 



971 



