X The Biological Society of WasJnngton. 



E. A. De Schweinitz: The Practical Working of the Serum 

 Treatment for Swine.* 



Erwin F. Smith: The Effect of Acid Media on the Growth of 

 Certain Plant Parasites, f 



January 28, 1899— 30ist Meeting. 



The President in the chair and 57 persons present. 



The evening was devoted to a symposium upon the topic 'The 

 Great Dismal Swamp', with the following speakers: 



David White: Geology and Physiography of the Dismal 

 Swamp. 



F. G. Gardner: Soils of the Dismal Swamp. J 

 Thomas H. Kearney: The Flora of the Dismal Swamp. § 

 William Palmer: The Fauna of the Dismal Swamp. 



February 11, 1899— 302d Meeting. 



The President in the chair and 13 persons present. 

 A severe blizzard was in progress and the society adjourned 

 immediately after the reading of the minutes of the preceding 



meeting. 



February 25, 1899—303*1 Meeting. 



The President in the chair and 33 persons present. 



H. J. Webber discussed the recent researches of Lawson on 

 Cobaea scandens in which a new method of spindle formation is 

 described. 



Gen. Sternberg called attention to the falling of leaves of 

 Maynolia grandiflora in Washington caused by the recent 

 severe cold. 



The evenino- was devoted to the further discussion of the 

 Dismal Swamp. The following speakers participated: W. H. 

 Seaman, F. D. Gardner, F. V. Coville, William Palmer, Ver- 

 non Bailey, A. K. Fisher, M. B. Waite, and Lester F. Ward. 



*The Serum Treatment of Swine Plague and Hog Cholera. Bull. 23 

 Bureau Animal Industry, U. S. Dept. of Agr., 1899, pp. 1-18. 



+To be published as a Bulletin of the Division of Vegetable Physiology 

 and l*atho]ogy, U. S. Dept. of Agr. 



^To bo published in Contributions U. S. Nat. Herb. 



gTo be published in Contributions U. S. Nat. Herb. 



