123 



The second picture shoAved the movement of the protoplasm 

 in the cells of a leaf of Elodea. Another view showed the flow 

 of protoplasm in the hypha of the fungus Pylhiiim. 



Dr. Harvey then spoke of the disease of potatoes known as 

 leak caused by the parasite Pythiiini which is doing so much 

 damage in the potato region of San Juaquin Valley in California. 

 The speaker explained in considerable detail how the pictures 

 were obtained. The pictures showed the behavior of a hypha 

 during the act of penetrating the wall of a cell of the potato 

 tuber. 



Informal discussion followed the lecture. Meeting adjourned. 



B. O. Dodge, 



Secretary 

 April 8, 1919 



The first meeting in April was held at the American Museum 

 of Natural Histor>\ President Richards called the meeting to 

 order at 8:15 P.M. There were 25 persons present. 



As there was no business to be transacted, the reading of 

 minutes was postponed. 



Dr. J. N. Rose, National Museum, Washington, D. C, gave 

 an illustrated lecture on Botanical Explorations in Equador. 

 The following abstract was prepared by the speaker: 



"Dr. Rose gave an account of his recent botanical trip to 

 Ecuador where he went in 191 8 to inaugurate the cooperative 

 investigation of the flora of South America which has recently 

 been organized by the United States National Museum, The 

 New York Botanical Garden and the Gray Herbarium of Harvard 

 University. 



"He described in some detail the flora which is seen in going 

 from Guayaquil on the coast to the high Andean Valley. He also 

 described his trip to southern Ecuador, where he traveled over 

 the old route followed by Humboldt and Bonpland more than a 

 hundred years before. On this expedition he re-collected many 

 of the species obtained previously by Humboldt, collecting some 

 of them from the exact locality from which they had been 

 reported by him. 



"His chief work was done about the little town of Huigra, 



