23 



4. Mr. Youdir spoke on "The application of physical chem- 

 istry to biological projects" and illustrated a number of in- 

 genious contrivances particularly in relation to photo-electric 

 cells. 



5. Dr. Hitchcock demonstrated "Technique developed to 

 determine the cause of blue discoloration in Hydrangeas" and 

 also summarized the results of their investigations. 



6. Dr. Zimmerman gave a short illustrated talk on their 

 work concerning the translocation of materials backward and 

 forward through the stems at the same time. 



\'ice-President W'odehouse took the chair at this time and 

 on behalf of those present expressed to Dr. Zimmerman their 

 appreciation of the afternoon's program. 



Approximately ninety persons were present for the first part 

 of the program. This included the Botanical Club of Barnard 

 College, present under the charge of Dr. Sinnott. 



A business meeting was called and about twenty-eight mem- 

 bers remained. The minutes of the meetings of March 21st and 

 April 3rd were read and approved. 



Mr. James Kezer, 10 Orchard Road, Chatham, N. J., was 

 unanimously elected to membership in the club. 



The resignation of Miss A. Mabel Barrow, 1325 Pacific 

 Street, Brooklyn, N. Y., was accepted with regret. 



Dr. Harper presented the Report of the Committee on 

 Amendments to the Constitution, and moved its adoption. It 

 was seconded by Dr. Karling and carried unanimously. 



The meeting was adjourned at 4:50 P.]\I. 



S. M. Pady 



Acting Secretary 



