XXIV 



Trans. Acad. Sci. of St. Louis. 



onstrated that the frequency could be determined by the 

 vibration of an air column, in a brass or glass tube, set in 

 motion by the current. 



Mr. W. C. G. Kirchner presented a paper entitled Con- 

 tributions to the Fossil Flora of Florissant, Colorado. 



Mr. M. L. Holman, of St. Louis, was elected an active 

 member. 



One person was proposed for active membership. 



October 17, 1898. 



President Engler in the chair, ten persons persent. 



Mr. C. H. Thompson spoke of some interesting stylar 

 movements of certain Marantaceae, connected with their pol- 

 lination, his observations referring to Maranta, Calathea and 

 Thalia, 



Seven persons were proposed for active membership. 



November 7, 1898. 



President Engler in the chair, fourteen persons present. 



Mr. James A. Seddon read a paper on Kesistance to Flow 

 in Hydraulics, in which the point was made that relatively a 

 small part of this resistance, so far as open streams were 

 concerned, was directly attributable to friction against the 

 bottom and limiting banks, but that the resistance was found 

 acting between accelerations and impacts, and showed in 

 forced distortions of the free surface, from which forms the 

 energy passed into internal motion. 



The following persons were elected active members: 

 William Herzog, Dr. Theodore Kodis, A. S. Langsdorf, J. 

 George Lumelius, Herman Overstolz, of St. Louis; A. L. 

 Quaintance, of Lake City, Florida; Dr. T. J. J. See, of 

 Montgomery City, Missouri. 



Two persons were proposed for active membership. 



