MINUTES OF THE INSTITUTE. 



February 2, 191 1. — Regular monthly meeting, with Vice 

 President Henry L. Broomall in the chair. Reports of Cura- 

 tors and committees and current business. Donations to the 

 library were announced as follows: "Psychology," by Wil- 

 liam James; "Delaware County Republican," file of 1835-39. 

 Dr. H. H. Furness. of Wallingford, Pa., presented to the 

 museum an ear of maize of unusual form, a complete descrip- 

 tion of which will be found in these Proceedings, Volume 

 VI, Number 2. C. M. Broomall explained by diagram the 

 theory of the curved flight of a ball, ,by which it curx'es in 

 the direction of motion of the front of the ball. The meet- 

 ing closed with a discussion on light pressure and its effects. 

 On motion adjourned. 



February 23, i9ti. — Adjourned meeting. Lecture, 

 " Poetry of the Sea," by Prof. Wilkie Nelson Collins, of the 

 University of Pennsylvania. 



March 2, 191 1. — Regular monthly meeting, with Presi- 

 dent T. Chalkley Palmer in the chair. Reports of Curators, 

 committees and current bills. Albert W. Barker was elected 

 to membership. Donations to the library were announced as 

 follows: Two volumes of "Smithsonian Miscellaneous Col- 

 lections"; eighteen volumes of United States "Geological 

 Survey Bulletins" and "Water Supply Papers." C. M. 

 Broomall exhibited some cultures of bacteria from the Media 

 water supply and spoke of their significance. President 

 Palmer by request gave a short account of his recent visit to 

 the Royal Microscopical Society (London) and the courteous 

 treatment he had received. He referred to the Society's col- 

 lection of historic microscopes as being of especial interest. 

 President Palmer reported having found among a collection 

 of fossil diatoms from the middle Neocene of Georgia a form 

 evidently identical with that described recently by him as 

 Navicula socialis. Meeting adjourned. 



