722 Proceedings of Royal Society of Edinburgh. [sess. 
nected with this work fell to him as Secretary. He also took a 
great interest in the Scottish Fisheries, and it was upon the passing 
of the Bill which established the Fishery Board for Scotland in 
1882 that he retired from the position of Secretary of the joint 
Boards of Manufactures and Fisheries. He was elected a Fellow of 
this Society in 1849, and bequeathed to it a sum of £200. He 
died on 20th March 1898. 
I cordially thank all those from whom I have received informa- 
tion contained in the statement now read, and above all, as 
having, of course, aided me most, our ever kind and zealous 
Librarian, Mr Gordon. 
2. On the Miscibility of Liquids at Different Temperatures. By Pro- 
fessor Kuenen. 
3. On Reversion in Birds and Mammals. ( With Lantern Illustrations .) 
By Professor Ewart. 
Mr James R. Apple yard, Mr James Chatham, Mr T. E. Gate- 
house, Dr Ewen John Maclean, Dr E. W. W. Carlier, and Dr 
T. H. Milroy were balloted for, and declared duly elected Fellows 
of the Society. 
SECOND ORDINARY MEETING. 
Monday , 19^ December 1898. 
The Right Hon. Lord Kelvin, President, in the Chair. 
Dr T. H. Milroy and Mr James Chatham were admitted 
Fellows of the Society. 
The following Communications were read : — - 
1. Crane Scaffoldings: — their Mathematical Calculation and Probable 
Theoretical Deficiencies. By R. G. Alford, M.Inst.C.E. ( With Lantern 
Illustrations.) 
2. Note on Dew-Bows. By Drs C. G. Knott and R. A. Lundie. 
pp. 350-352. 
3. On the Reflection and Refraction of Solitary Plane Waves at a Plane 
Interface between two Isotropic Elastic Mediums, Fluid, Solid, or Ether. 
By the President, pp. 366-379. 
4. Equilibrium between Sulphuric Acid and Sulphates in Aqueous 
Solution. By Sydney A. Kay, B.Sc. Communicated by Professor 
Walker, pp. 484-522. 
5. Dust Figures of Electrostatic Lines of Force. By David Robert- 
