Record. xxix 



Professor F. E. Nipher gave a most interesting lecture 

 on Electricity and Matter, reviewing his recent work on 

 the electric discharge. 



The death of Professor Paul Schweitzer was reported. 



November 6, 1911. 



Vice-President Nipher in the chair ; attendance 14. 



Dr. J. J. Kessler presented a paper entitled *' Interpola- 

 tion Method of Oil Analysis.'^ 



The following were elected to membership: Elyse C. 

 Crecelius, B. F. Floyd, L. A. P. Harms, Frederick Hecker, 

 L. P. Jensen, S. S. Knight, Philip N. Moore, Frederick B. 

 Mumford, Francis A. Sampson, M. E. Wilson and Walter 

 B. Woodward. 



The death of Professor Theodore Escherich, an honor- 

 ary member, and of Dr. Chas. H. Gundelach, an active 

 member, was reported. 



November 20, 1911. 



Vice-President Nipher in the chair ; attendance 23. 



Professor James F. Abbott presented an interesting 

 paper on **An Examination of Poulton's Theory of 

 Mimicry. * ' 



The following were elected to membership: Eobert H. 

 Baker, F. C. Greene, Jr., Thomas K. Skinker, Joseph Da- 

 mas LaBrie, Ada E. Plass and George M. Smith. 



December 4, 1911. 



President Trelease in the chair ; attendance 24. 



Professor Wm. H. Eoever presented a paper on '^The 

 Deviation of Falling Bodies.** 



Professor Murrill, of the New York Botanical Garden, 

 spoke of some of his experiences collecting Fungi in many 

 lands. 



Mr. Frank Schwarz, Professor C. A. Waldo and Mr. J. 

 Andrew Drushel were elected to serve as a committee to 

 nominate officers for the year 1912. 



