liv 



A reply expressing the appreciation of the family of Judge 

 Breckinridge was read by the Secretary. 



Dr. W. Tovvnsend Porter exhibited an apparatus for the admin- 

 istration of ether and chloroform to tracheotomized animals dur- 

 ing artificial respiration. The device consisted of a respiration- 

 flask inserted in the course of the tube leading from the bellows 

 to the tracheal canula. The flask is of two litres capacity, and 

 has three necks. Two of these are furnished with wide glass 

 tubes, A and B, of such a length that the air entering through A 

 must stream along the floor of the flask in order to reach the exit- 

 tube £. The middle neck is fitted with a small separating-funnel 

 provided with the usual ground-glass cock and stopper. The 

 funnel is filled about three-fourths full with the ether-chloroform 

 mixture, and the stopper replaced. During artificial inspiration 

 the pressure in the flask is increased and bubbles of air pass up 

 the funnel-tube, but the ground-glass stopper prevents the ether 

 from being driven out. During expiration the pressure in the 

 flask rapidly sinks, and one or more drops of the anaesthetic fall 

 through the funnel-tube. The number of drops, and consequently 

 the degree of saturation of the inspired air, can be regulated by 

 turning the stop-cock. 



Prof. Nipher read a paper on "Certain Properties of a Field of 

 Force due to a Single Mass." 



The paper was referred to the Council for publication. 



Mr. H. J. Webber presented by title a "Catalogue of the Flora 

 of Nebraska," and gave a short statement of the purpose and con- 

 tents of the catalogue. This contribution was referred to the 

 Council for publication. 



On the invitation of the President, Prof. E. S. Morse of Salem, 

 Mass., favored the Academy with some remarks on the Evolu- 

 tion of the Bow. 



Novemhei' 2d, 1891. 



President Nipher in the chair ; sixteen members present. 



Dr. Trelease read a paper entitled "The Object of the Botani- 

 cal Movement in St. Louis," in which he outlined the field of 

 botanical research, and indicated some of the ways in which the 

 Botanical Garden and School of Botany, established by the late 



