EDITORIAL. 621 



ginia and Maryland, by N. H. Darton ; Notes on the Geological 

 Exhibits of the World's Fair, by G. H. Williams ; Dislocation of 

 the Strata of the Lead and Zinc Region of Wisconsin and their 

 Relation to the Mineral Deposits, with some observations upon the 

 Origin of the Ores, by W. P. Blake ; Geology of the Sandhill 

 Region in the Carolinas, by J. A. Holmes ; The Gravels of the 

 Glacier Bay in Alaska, by H. F. Reid ; The Arkansas Coal 

 Measures in their Relation to the Pacific Carboniferous Province, 

 by James Perrin Smith ; Glaciation of the White Mountains, 

 N. H., by C. H. Hitchcock. 



Professor Reid's paper on the Gravels of Glacier Bay was 

 given the form of an illustrated evening lecture, and was found 

 entertaining and instructive by the popular audience as well as the 

 members of the society. By admirable photographic illustra- 

 tions he brought forth very clearly and impressively many of the 

 features of glacial action. It was peculiarly valuable as illustrat- 

 ing the behavior of alpine glaciers when they reach unusual mag- 

 nitude, and particularly when they approach the Piedmont type. 



The paper of Sir J. Wm. Dawson does not admit of ready 

 synopsis. It needs to be read in full. Professor Claypole pre- 

 sented a number of interesting and apparently important facts 

 relative to fossil fishes from north-eastern Ohio. 



One of the more notable papers was that of Professor Steven- 

 son, in which objections were urged against the current doctrine 

 of the origin of anthracite through metamorphic agencies con- 

 nected with heat and pressure. In lieu of this hypothesis, which 

 the author held to be untenable, an hypothesis was offered con 

 necting the origin of anthracite with the conditions of deposition. 

 Anything less than a full statement of the author's view in his 

 own language would fail to do it justice. 



The paper of Professor Hall and Mr. Sardeson, read by the 

 latter, endeavored to correlate, in much detail, the series of mag- 

 nesian limestones of the north-western states. The most notable 

 feature was the placing of the dividing horizon between the mid- 

 dle and the upper Cambrian considerably higher than has been 

 done by most previous writers, throwing the larger part of the 



