334 Proceedings 



A. A. A. S., inviting the Association to hold its 1908-9 meeting in 

 Minneapolis. Adjournment at 9:45. 



H. Gale, Secretary. 



293ci Meeting, Tuesday, October Sth, 1907, in the Academy's Museum 



Room. 



President Walker presiding; 12 present. 



A report from Curator Roe was read, describing the increased 

 attendance at the museum since it was opened free through the 

 Library Board's paying the curator a salary, and suggesting that the 

 library of the Academy be put in shape for use. 



The program of the evening being "Informal Reports of our Sum- 

 mer's Scientific Work or Reading" Professor Winchell reported a curi- 

 ous accidental deception. On examining a supposed meteoric stone 

 by thin sections he found it a fine-grained fragmental rock, with 

 metallic substances on the outside. As he could not account for this 

 external metallic substance it finally occurred to him that it might be 

 aluminum which had rubbed off from his pocket magnifying glass, 

 as he had carried them together in his pocket. Such proved to be 

 the case, and he found similar aluminum specks on other stones of 

 his collection. He also called attention to some apparent Indian 

 Mounds on the Pacific coast in Oregon, which were now believed, as 

 described by Mr. Upham earlier, to be of drift or terminal moraine 

 origin. The nature and origin of the iron ore in the Mesabi Range, 

 which he had visited again this summer, were discussed by Professor 

 Winchell. 



President Walker described his first buying of iron lands in the 

 Mesabi Range about 25 years ago, and his tracing the veins of iron by 

 the hills, water courses and the magnetic needle. 



Professor Oestlund reported a six weeks visit to Vancouver, Id., 

 and his special studies in plant lice, some three-quarters of his 30 

 species collected there being new to science. 



Dr. Sardeson reported having been engaged all summer in a 

 search for pottery clay near New Ulm and the discovery of it where 

 other searchers had not found it. 



Professor Lange, of St. Paul, reported having studied on the 

 north short of lake Superior the influence of wild mammalian life on 

 trees and animal life. Moose and deer, of which he had seen 36 and 

 35 respectively in five days, had killed the willows and kept down the 

 mountain ash, birch, poplar, and June-berry; they had not touched 

 the spruce, fir, and black alder, but water lilies had been eaten, leaves 

 and stalk. 



The Secretary reported having found a delightful and instructive 

 picture of German student life 60 years ago, and of a country 

 physician's work in Dr. Kussmaul's "Jugenderrinerungen." Ad- 

 journed at 10 P. M. 



H. Gale, Secretary. 



