Proceeding i^- 21 



searches in the Glacial Geology of Minnesota. The paper was 

 based largely on Mr. Upham's own labors and observations and 

 reflected his most mature views on the subject. 



June 2, 1885. 



Eighteen persons present. , 



Professor L. W. Chaney, Jr., of Carleton College presented a 

 paper on the Anatomy of the Crayfish, with some observations on 

 its embryology. 



0. W. Oestlund read ''Notes on the numbers of insects al- 

 ready known and probably to be found within the State.'' 



Secretary Hall read a paper by Mr. J. C. Arthur on "Some 

 Algae of Minnesota, supposed to be poisonous." This was a second 

 paper on the subject by Mr. Arthur, the first having been already 

 published by this Academy.* 



[See paper 0. ] 



October 0, 1885. 



Eighteen persons present. 



The Northern Pacific Coal Company, through Mr. C. F. 

 Sidener, presented a series of coal and lignite specimens. These 

 specimens represent the same coals and lignites analyzed by Pro- 

 fessor Dodge and Mr. Sidener and reported by the former at the 

 April meeting last. 



Secretary Hall read a paper from N. H. Winchell entitled 

 *'The Lingulae and Paradoxides of the Catlinite of Southwestern 

 Minnesota." [See paper P.] 



Warren Upham read a paper on ''Red Lake and the Ojb. 

 ways" with geological and botanical observations on North- 

 western Minnesota. 



C. W. Hall read "a brief history of Copper-mining in Min- 

 nesota." [See paper Q.] 



Also a paper on " the lithological characters of the Trenton 

 limestone of Minneapolis and St.Paul," with a note on the borings 

 of the West Hotel artesian well. [See paper R.]t 



November 3, 1885. 

 Thirty-three persons present. 

 President Elliot called the attention of the members present 



*Vol II, Bui. IV, Appendix. 



tTbe paper as published is an abstract of what was given at this time, 

 and that presented one year ago when a series of samples of the Trenton and 

 Cambrian rocks at Minneapolis was presented to the Academy. See page 13» 

 C. W. H. 



