.11 UHV, vv^ 



1891.] Botanical Club of the A. A. A. S. 261 



and reappears in the mineral form as a phosphate, and is uti- 

 lized in the production of animal bone. It thus appears that 

 the lecithin bodies are a channel through which the circula- 

 tion of the clement phosphorus is conducted, passing from 

 the mineral, through the vegetable and into the animal king- 

 dom. 



Rap hides the cause of the acridity of certain plants: H. 

 A. WEBER. — Chemical" tests show that the reason why some 

 plants, like Arissma, are acrid, while others also abundantly 

 supplied with raphides, like Tradescantia, arc not acrid is be- 

 cause the latter have the bundles of raphides surrounded by 

 an insoluble envelope, not present in the former. In the one 

 case the raphides are readily dissolved in the mouth and pro- 

 duce the biting sensation ; in the other case they do not dis- 

 solve and consequently cannot be tasted. 



Botanical Club of the A. A. A. S. 



The meetings of the club were held from 9 to 10 am., on 

 Thursday, Friday and Saturday of the session of the Associ- 

 ation. They were well attended, quite as well in fact as the 

 Section of Biology which followed later in the day. 1 he num- 

 ber of papers presented was unfortunately limited by the brief 

 sessions, but they were of more than usual interest. I he fol- 

 lowing is a summary of the papers read : 



Remarks on some apparatus upon exhibition : J- C Ar- 

 thur.— A brief description of respiration apparatus exhibited 

 by Dr. Atkinson and himself, and also of ^ome other piece 

 of physiological apparatus. A student's reagent case was 

 also exhibited by Prof. Beal. 



The perfect stage of Cercospora gossipina : GEO K AT- 

 KINSON.— An account of further studies upon the life history 

 of this parasitic fungus. 



B. D. Halstin. 



L. H . Pa M. MEL. — A record 



Notes on egg pU 



)f some fi 



of the occurrence of some parasitic fungi during I»9>- " 

 discussion Prof. L. H. Bailey expressed the opinion that by 



