a ca 

1891.] Proceedings of Scientific Societies. 941 
Owing to the death of the president, Prof. Alex. Winchell, the vice 
president, Mr. G. K. Gilbert, took the chair. 
In opening the meeting the acting president, Mr. G. K. Gilbert, 
made a few brief remarks, in which he welcomed the society to Wash- 
ington, and, in the name of President Welling, to the university. A 
touching memorial of the deceased president of the society, Alexander 
Winchell, was read by Prof. N. T. Winchell, brother of the deceased. 
The paper gave a sketch of the life and work of Prof. Winchell, and 
was a fitting tribute to a man who occupied his high position among 
geologists. 
The following papers were read : 
MONDAY, AUGUST 24TH.—A Geological Map- of South America, 
Prof. Dr. Gustav Steinmann, University of Freiburg, Germany. On 
the Permian, Triassic, and Jurassic Formations in the East Indian 
Archipelago (Timor and Rotti), Dr. August Rothpletz, University of 
unich, Germany. Thermometamorphism in Igneous Rocks, Mr. 
Alfred Harker, St. John’s College, Cambridge, England. The Lower 
Silurian (Ordovician) Ichthyic Fauna, and Its Mode of Occurrence, 
C alcott. Relations of the Plant-Bearing Deposits of the 
American Trias, Lester F. Ward. Studies in Problematic Organisms : 
The Genus Scolithus, Pa, F. Pon The Tertiary Iron Ores of 
Arkansas and Texas, R. se, Jr. Contribution to the | 
Geology of the Plains, EAEE ao iñ Northwestern Nebraska, 
Robert Hay. ' Some Recent Experimental Reproductions of Scottish 
Mountain Structures, Henry M. Cadell, Esq., Scotland. Mechanics of 
Appalachian Structure (with lantern illustrations), Bailey Willis. 
TUESDAY, AUGUST 25TH.—The Relations of the Fossil Echinoid 
Faunas of Europe and America, Mr. John Walter tig British 
Museum, London, England. On the Eurypterus Beds o l as 
Compared with Those of the Waterlime of North America, i Fried- — 
rich Schmidt, Academy of Sciences, St. Petersburg, Russia. Sur les 
Couches Marines Terminant le Jurassique et Commengant le Crétace 
et sur l’Histoire de leur Faune, Prof. Alexis Pavlow, University of 
Moscow, Russia. Sur Homme Contemporain du Mammouth en 
Belgique, Prof. Max Lohest, University of Liége, Belgium. On the 
Quaternary Changes of Level in Scandinavia, Baron Gerald de Geer, 
State Geologist, Stockholm, Sweden. The Black Earth of the Steppes 
of Southern Russia: Its Origin, Distribution, and Points of Resem- 
blance With the Soils of the American Prairies, Prof. A. Krassnof. 
Sur l’Existence du Dinotherium en Roumaine, Prof. Gregoire Stefan- 
escu, University of Bucharest, Roumania. ‘The Present Standing of 



