Proceedings, d'C.,for 1880. 101 



September 29th. — Mr. Kernot submitted the results of some 

 experiments to determine the efficiency of a small turbine known 

 as Bailey's Thirlmere Motor. 



October 27th. — Mr. Ellery read notes on u Anemometers," and 

 directed the attention of the Section to the desirability of devising 

 improved appliances for determining the velocity and pressure of 

 the wind. 



Mr. Patching then read notes on methods of determining the 

 viscosity of liquids, and exhibited a viscosimeter of his own con- 

 struction. 



Though the attendance at the meetings has been but small, I 

 am happy to say that the debates have been well maintained, and 

 considerable interest shown by the members in the questions sub- 

 mitted. 



It is with feelings of deep regret that I have to inform the 

 Council of the death of Mr. Henry S. Patching, who has filled 

 the office of Secretary to the Section since its reorganisation in 

 July, 1879. In him the Section loses a most assiduous officer, 

 and the Society a laborious and enthusiastic member. 



I have the honour to be, 



Your obedient servant, 



W. C. KEPNOT, M.A, 



Chairman of Section A. 



Royal Society's Hall, 2nd March, 1881. 



REPORT ON SECTION BCD. 



Early in the year 1880 it was decided to form Sections BCD, 

 as provided by the Pules of the Poyal Society. Nineteen names 

 were received, but owing to the limited number of members for 

 each Section, and as the work of each Section was closely allied, it 

 was considered advisable to amalgamate them, and hold the meet- 

 ings as for one section. 



Mr. Goldstein was appointed by the Council to act as Secretary, 

 and he summoned a meeting for the 21st of April, 1880, at which 

 the following members were present : — Messrs. Blackett, Duerdin, 

 Goldstein, Challen, Fenton, Fowler, and Patching. 



Mr. C. P. Blackett was appointed to act as chairman, and Mr. 

 Patching as secretary of Section BCD. 



The next meeting of the Section was held 26th April, 1880, at 

 which Mr. Blackett read a paper on Mr. Birkmire's method of 



