92 



PROCEEDINGS OF THE CLUB 



Wednesday, April 30, 1902 



The meeting was held at the Botanical Garden at 3:30 p. m.; 

 27 persons present ; Rev. L. H. Lighthipe in the chair. 



There were four elections to active membership : Mr. Elmer 

 C. Hazard, Shrewsbury, N. J.; Mr. Ewen Mclntyre, 303 West 

 74th St., New York ; Professor Henrietta E. Hooker, Mt. Hol- 

 yoke College, South Hadley, Mass.; and Miss Fannie F. Rabino- 

 wich, 22 Attorney St., New York. 



Dr. Britton spoke of Dr. Oliver Willis's recent death and the 

 following committee was appointed to draw up resolutions : Dr. 

 Britton, President Brown and Dr. Rusby. 



The first paper by Dr. C. C. Curtis, was on " Some Features 

 connected with Transpiration." Transpiration may be illustrated 

 by a fluctuating curve. The maximum of the curve is found in 

 the forenoon. Transpiration can hardly be considered to be 

 wholly a physical property. The volume of water given off by 

 plants in the night is very considerable, and probably the stomata 

 are never completely closed. It seems perfectly rational that the 

 stomata are open, partly, in the dark and that some transpiration 

 takes place. During the early morning hours, the amount of 

 water given off is much more than in the afternoon, when the 

 stomata have become accustomed to the light. 



The second paper announced was by Dr. H. H. Rusby, on 

 "A new Genus of Violaceae, with Remarks on other Genera." 

 This was deferred on account of absence of the author. 



The third paper, by Dr. H. M. Richards, was on " Turgor 

 Changes in injured Tissues." It has been shown that the curve 

 of respiration in injured plant tissues rises for a time and then 

 falls off to the normal. The " wound fever," or rise-in-tempera- 

 ture curve is similar to that of respiration. Turgor changes 

 apparently accompany these reactions towards injury. The 

 onion was used for experiment, and the wounded and uninjured 

 bulbs were placed in a saturated atmosphere. The normal tur- 

 gor pressure in terms of KNO. { solution is about 3.5 to 4^ ; 

 after wounding this falls about o.^fo. As the healing goes on, 



