Proceedings. 7 



F. W. Putnam for 51 set of the proceedings of the American 

 association for the advancement of science presented by him in 

 August. 



A paper was read by secretary Hall, from A. F. Bechdolt. 

 of Alankato, entitled "notes on the local geology of Mankato." 

 [See paper (>.] 



Warren Upham, then read a review of the recent book by 

 Baron Nordenskjorld, The voyage of the Vega. 



November 8, 1883. 

 Fifty-two persons present. 



Andrew liinker, of Minneapolis and W. J. McGee of the U. S. 

 Geological Snrvey Washington were elected members. 

 The following additions to the museum were received: 

 From Geo. PI. Mill-r, a specimen of native copper wpighing 75 lbs. It 

 was taken from the glacial draft at Taylors Falls in 188'2. 



From President EL lot, silver and gold ores near Helena, Montana, 5 spec- 

 imens. 



From Dr. C. ]\I. Skinner, a nautilus sp? in sections, Yell(w Stone river 

 valley. 



The evening was devoted to tlie discussion by the section of 



Sanitary science of the question : "What aid has science given 

 for the prevention and control of infectious diseases?'' An unusu- 

 ally large number of members of the section took part in the dis- 

 cussion and the meeting proved to be one of unusual practical 

 every day interest. 



December 4, 1883. 



Thirteen persons present. 

 Presentations: Nathan Butler, some pieces of resin or amber from the 

 coal beds near Dickinson, Mont. 

 President Elliot, some pieces of ore from mine ih Colo. 



Professor W. A. Pike gave a description of the methods pur- 

 sued in testing the strength of materials in engineering schools. 

 N. H. Hemiup read a paper on "Cosmic dust." 

 It. J. Mendenliall mentioned a meteoric shower at and 

 around Minneapolis in which a black powdery substance fell on the 

 SQOW to the depth of from one-sixth to one-fourth of an inch in the 

 winter of 18()0-()1. The shower was of considerable extent. 



