xliv Trans. Acad. Sci. of St. Louis. 



March 4, 1895. 



President Green in the chair, fifty-five persons present: 



In exhibiting a photograph of the late Professor Helmholtz, 

 presented to the Academy by Professor Pritchett, the Presi- 

 dent briefly reviewed the life and labors of Helmholtz, noting 

 especially his great work on physiological optics and his in- 

 vention of the ophthalmoscope. Professor Nipher also spoke 

 of the researches of Helmholtz in the domain of physics. 



Professor C. R. Sanger delivered an address on argon, re- 

 viewing the history of atmospheric study from the time of 

 Cavendish, in the last century. 



Three persons were proposed for active membership. 



March 18, 1895. 



President Green in the chair, eight persons present. 



The following persons, resident in St. Louis, were elected 

 active members: — John Alden, Wm. C. Teichmann, Philip 

 Gruner. 



One person was proposed for active membership. 



April 1, 1895. 



President Green in the chair, eight persons present. 

 One person was proposed for active membership. 



April 15, 1895. 



President Green in the chair, twenty-nine persons present. 



Miss Mary E. Murtfeldt read a paper on the habits of 

 certain seed-feeding insects, giving the results of her observa- 

 tions and experiments on insects which feed on the seeds of 

 weeds and other injurious plants. The conclusion was stated 

 that these insects exercise a very pronounced effect in pre- 

 venting the spread of weeds, — and in some instances almost 

 exterminate them. 



The following persons, resident in St. Louis, were elected 

 active members: — Edward Mallinckrodt, Charles Espen- 

 schied. 



