PROCEEDINGS. 31 



Prof. Lester F. Ward read a paper entitled A Statistical View of 

 THE Flora of the District of Columbia.* 



Prof. J. H. Comstock read a paper entitled Notes on Scale In- 

 sects, illustrating his remarks by a collection of specimens. f 



Thirteenth Meeting, May 20, 1881. 



The President occupied the chair. Thirty-one members were 

 present. 



Prof. Riley made some remarks upon Prof. Comstock's paper 

 on Scale Insects, and was responded to by Prof. Comstock. Dr. 

 George M. Sternberg, U. S. A., read a paper entitled On Mi- 

 crococcus SEPTicusJ illustrating his remarks by photo-micrographs 

 thrown upon a screen by the lantern. This paper was discussed by 

 Messrs. Seaman, Ward, and Taylor. 



Fourteenth Meeting, June 3, 1881. 



The President occupied the chair. Thirty-five members were 

 present. It was announced that after the next meeting the Society 

 would be adjourned until the first Friday in October. 



Dr. D. W. Prentiss read a paper entitled The Physiological Ac- 

 tion OF Jabirandi, (Pilocarpus pinnatifolius.)§ 



* 1 88 1 . Ward, Lester F. Field and Closet Notes on the Flora of Washington 

 and Vicinity. <BulIetin, Philosophical Society of Washington. IV. i88l. 

 pp. 64-120. (Statistical View pp. 8S-104, 116-119.) See also in Bulletin 22 

 U. S. National Museum, cited above, p. 26. 



fiSSi. Comstock, James H. Report on Scale Insects. <Report of the 

 Entomologist of the U. S. Department of Agriculture for the year 1880. pp. 

 235-373- (Scale Insects, pp. 276-349. Plates III-XXII.) 



t Sternberg, George M. A Contribution to the Study of the Bacterial Or- 

 ganisms commonly found upon exposed Mucous Surfaces, and in the Alimentary 

 Canal of Healthy Individuals. <Studies from the Biological Laboratory of Johns 

 Hopkins Univer-.ity. II. 1882. pp. 157-iSl. Plates XI-XIII : and in Pro- 

 ceedings, American Assoc. Adv. Sci., XXX, 188 1. 



§ 1S81. Prentiss, D. Webster. Remarkable change of color of the hair 

 from light blonde to nearly jet black in a patient, while under treatment by pilo- 

 carpin. Report of pyelo-nephritis, with unusually prolonged anuria. <[Phila- 

 delphia Medical Times. .XL 1881. (No. 335, July 2, 18S1.) pp. 609-12; also 

 reprinted with following title : 



I. I Remarkable change in the color of the | hair from light blonde to 



