21 4 



POPULAR SCIENCE MONTHLY. 



Europe as the subject of the 

 map because it contained a 

 great area, practically well 

 known, the largest number of 

 geologists, and included the 

 greatest number of carto- 

 graphical difficulties. Con- 

 taining the- largest number of 

 geologists, representing many 

 nationalities, it was conceded 

 that any map which could 

 pass their acceptance would 

 stand any test of criticism 

 elsewhere. The inherent puz- 

 zles of structure in Europe 

 furnished a fascinating series 

 of difficult problems for solu- 

 tion, long and zealously dis- 

 cussed, with both natural and 

 artificial intricacies. No bet- 

 ter area to test the patience 

 and tax the genius of the con- 

 gress could have been chosen. 

 The committee appointed to 

 prepare the map comprised 

 Messrs. Beyrich and Hauchecorne, of Germany, with power of 

 direction at Berlin ; Prof. Renevier, of Switzerland, as general sec- 

 retary; Messrs. Daubree, of 

 France ; Giordano, of Italy ; 

 A. Karpinsky, of Russia; 

 Mojsisovics, of Austria-Hun- 

 gary ; and Topley, of Great 

 Britain. Professors Dau- 

 bre*e, Giordano, and Topley 

 have since died. The scale 

 of the map is one in one mil- 

 lion and a half. It is divided 

 into forty - nine sheets of 

 18*89 by 20'86 inches. These 

 sheets, when all are com- 

 pleted, will form a rectangle 

 11'04 feet high by 1217 feet 

 wide. The topographic base 

 was prepared by Prof. Kie- 

 pert, of Berlin. D. Reimer 



& Co., Berlin, are the pub- DR. JAMES HALL, New York State Geologist. 



PROF. A. KARPINSKY, Director of the Imperial 

 Geological Survey and President of the Bureau 

 of Organization of the Congress. 



