Proceedings. 311 



The program of the evening was the reading of the follow- 

 ing papers : 



''The weeds of the Red river valley," by Warren Upham— 

 read by Professor MacMillan. 



''The x\ge of the Saganaga syenites," by Horace V. Win- 

 chell. 



This paper is printed in full in the American Journal of 

 Science for April, 1891, Vol. xli, p. 386. 



"The Color of the Fixed stars," by N. H. Hemiup. 



A letter from Messrs. Worcester and Bourns of the Menage 

 Scientific Expedition to the Philippine Islands, was read by the 

 secretary. 



The secretary also made the announcement that life mem- 

 berships had been taken by R. J. Mendenhall and Bishop J. Mc- 

 Golrick. 



April 7, 1 891 . 



Thirty persons present. 



Miss Bertha L. Wilson and George C. Andrews, of Min- 

 neapolis, and Frank T. Wilson, of Stillwater, were elected to 

 membership. 



Rev. D. S. McCaslin gave a description of "The Artesian 

 well basin of North and South Dakota. 



Secretary Hall read by title two short papers ; one, "The 



deep well at Blue Earth City, Minnesota," and the other "A 



Note on the well at Owatonna" recently bored for the city water 



works. 



May 5, 1891 . 



Twenty-four persons present. 



C. W. McCurdy, of Winona, was elected to membership. 



A paper entitled "The migration of plants during and since 

 the Glacial period," the last of a series of papers by Warren Up- 

 ham, was read by Professor MacMillan. 



The next paper was by Professor Conway MacMillan on 

 "The Rhythmic growth of the Potato tuber." 



"Analyses of specimens of efflorescence on brick buildings," 

 by Professor C. F. Sidener, and "Some Analyses of waters from 

 Artesian wells and other sources," by Professor J. A. Dodge, 

 completed the programme for the evening. 



The secretary announced that the Sophia Cross collection 

 had been secured for the Academv's museum. 



