March 3, 1884. 



Dr. Leete in the chair. Six members present. 



Mr. Nipher exhibited Hellmann's temperature diagrams for 

 twenty-five cities of North Germany, giving pentad means for 

 thirty-five years. Attention w^as called to the fact that the fluctua- 

 tions in the curves were common to the curves for all cities. 



Mr. A. Hunicke was elected to associate membership. 



March 17, 1884. 



Mr. W. H. Tivy in the chair. Seven members present. 

 A letter was read from Prof. J. W. Spencer with acknowledg- 

 ment of his election to corresponding membership. 



Mr. Nipher read a paper on the " Measurement of Electrical 

 Resistance as a Velocity," which was referred to the Publication 

 Committee. 



