The Biological Society of Washington. 



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 joist 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.]; 

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

 William Palmer: The Fauna of the Dismal Swamp. 



February n, 1899 3O2d 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 

 Magnolia grandiflora in Washington caused by the recent 

 severe cold. 



The evening 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. 



f-To be published as a Bulletin of the Division of Vegetable Physiology 

 and Pathology, U. S. Dept. of Agr. 



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



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



