xxviii Trans. Acad. Sci. of St. Louis. 



February 6, 1905. 



President Adolf Alt in the chair; attendance nineteen. 



Mr. J. H. Kinealy delivered a lecture on "Calorimeters 

 for Determining the Heating Powers of Fuels." With the 

 aid of a series of lantern slides he gave a history and a de- 

 scription of the various methods and apparatus used for this 

 purpose during the past one hundred years. 



February 20, 1905. 



Prof. F. E. Nipher in the chair; attendance thirteen. 



Mr. G. Pauls read a short paper on the relations of human 

 and plant life. 



Prof. C. M. Woodward delivered a lecture on the " Action 

 of an Eccentric Weight on a Rolling Wheel." He showed by 

 a series of mathematical formulae that the eccentric weight 

 of a locomotive wheel in motion, together with the centri- 

 fugal force, when running at a high velocity of about sixty 

 miles exerts an enormous pressure upon the track, which 

 pressure is balanced by a similar weight in the opposite spoke 

 of the wheel acting as a lifting power. 



March 6, 1905. 



President Adolf Alt in the chair; attendance fifteen. 



Mr. H. A. Huston, the lecturer of the evening, donated 

 to the Academy a collection of the raw materials from which 

 the products of the Stassfurt Industry are derived. 



Mr. H. A. Huston delivered a lecture on the " Stassfurt 

 Industry of Potash, Sulphate of Magnesia, Bromine, etc.," 

 illustrating with a series of lantern slides the geological 

 formation, the method of mining the raw material, the 

 technical apparatus and the shipping of the products. 



March 20, 1905. 

 President A. Alt in the chair; attendance fifteen. 



