706 Proceedings of the Royal Society of Edinburgh. 
held at 4.30 p.m. . with the exception of any Special Meetings which may be otherwise arranged 
by the Council.” 
The following Communications were read : — 
1. On the Resistance to Flow of Water through Pipes or Passages having Divergent Boundaries. 
By Professor A. H. Gibson, D.Sc. Communicated by Professor W. Peddie. Trans., vol. xlviii. 
pp. 97-116. 
2. On Metaclepsydropsis (Zyqopieris) duplex (Williamson). By W. T. Gordon, M.A., B.Sc., 
B.A. Communicated by Professor James Geikie. ( With Lantern Illustrations.) Trans. 
vol. xlviii. pp. 163-190. 
3. Laboratory Note on a Simple Method of Finding the Radius of Gyration of a Body. By 
Mr W. G. Robson. Communicated by Professor W. Peddie. Proc., vol. xxxi. pp. 517-518. 
The following Candidates for Fellowship were balloted for and declared duly elected : — 
Kenneth John Mackenzie, M.A., John Francis Hall-Edwards, L.R.C.P. (Edin.), and 
James Simpson Pirie, C.E. 
SIXTEENTH AND LAST ORDINARY MEETING. 
Friday, 14 th July 1911, at 4.30 p.m. 
Sir William Turner, K.C.B., President, in the Chair. 
By request of the Council an Address was delivered in the French language : — 
On Refractions at the Surface of a Lake, Mirages, and Fata Morgana. By Professor F. A. 
Forel, Switzerland, Honorary Fellow of the Society. 
The following Communication was taken as read : — 
Experimental Researches on the Specific Gravity and Displacement of some Saline Solutions. 
By John Young Buchanan, M.A., F.R.S. Proc., vol. xxxi. pp. 635-648 {Abstract), and Trans. 
The following signed the Roll and were duly admitted Fellows of the Society: — Frank 
Wyville Thomson, Duncan M. Y. Sommerville, M.A., D.Sc., Kenneth John M‘Kenzie, M.A. 
The Roll was also signed by Professor F. A. Forel, a Foreign Hon. Fellow of the Society. 
