232 
Proceedings of the Eoyai Society of Edinburgh. [Sess. 
FOURTH ORDINARY MEETING. 
Monday , February 4, 1918. 
Dr John Horne, F. R. S., F. G.S., President, in the Chair. 
The following Communications were read : — 
1. The Morphology of the Prosencephalon of Spinax as a type of Elasmobranch Fore-brain. 
By Dr J. Stuart Thomson. 
2. The Anatomy and Affinity of certain rare and primitive Ferns. By Dr J. M‘Lean 
Thompson. ( With Lantern Illustrations. ) 
3. A Further Study of the Diets of Labouring-Class Families in Glasgow in War Time. By 
Miss Margaret Ferguson. Communicated by Professor D. Noel Paton. 
Dr John M ‘Lean Thompson signed the Roll, and was duly admitted a Fellow of the Society. 
FIFTH ORDINARY MEETING. 
Monday , March 4, 1918. 
Dr John Horne, F.R.S, , F.G.S., President, in the Chair. 
The Annual Election of Fellows took place. The following were elected: — David Balsillie, 
Francis James Blight, Alexander Bremner, John M. Campbell, Alexander Scott Dodd, 
T. Lindsay Galloway, William Forbes Gray, P. S. Hardie, John Robert Lewis Kingon, 
George James Lidstone, James David M'Culloch, William Mackie, William Paterson 
Paterson, G. W. Tyrrell, Charles Whyte, John Thomas Wight. 
By request of the Council, Dr William Wilson exhibited his Astronomical Models for 
demonstrating the Rotational and Orbital Motions of the Earth and Moon in relation to the Sun 
and for elucidating various connected phenomena, such as the succession of the Seasons, the 
occurrence and recurrence of Eclipses, the phases of the Moon, etc. 
The following Communications were read : — 
1. Note on the Construction of an Orthogonant. By Sir Thomas Muir. 
2. A Reduction-formula for the Functions of the Second Kind connected with the Polynomials 
of Applied Mathematics. By Pierre Humbert. Communicated by Professor Whittaker. 
SIXTH ORDINARY MEETING. 
Monday , May 6 , 1918. 
[With this meeting was conjoined a Meeting of the Scottish Meteorological Society.] 
Dr John Horne, F.R.S. , F.G.S., President, in the Chair. 
The Council awarded : — 
1. The Keith Prize for the Biennial Period 1915-1917 to Robert C. Mossman for his work on 
the Meteorology of the Antarctic Regions, which, beginning with the important series of observa- 
tions made by him during the voyage of the Scotia (1902-1904), has continued to the present time, 
and includes his recent paper “ On a See- Saw of Barometric Pressure, Temperature, and Wind 
Velocity between the Weddell Sea and the Ross Sea,” published in the Proceedings of the Society. 
2. The Neill Prize for the Biennial Period 1915-1917, to Professor W. H. Lang, F.R.S., for his 
paper, in conjunction with Dr R. Kidston, F.R.S., on Rhynia Gwynne-Vaughani, Kidston and 
Lang, published in the Transactions of the Society, and for his previous investigations on Pteri- 
dopliytes and Cycads. 
These Prizes will be presented at the July Meeting. 
By request of the Councils of the Royal Society of Edinburgh and of the Scottish Meteoro- 
logical Society, Mr R. C. Mossman delivered an address on “The Climate and Meteorology of the 
Antarctic and Sub- Antarctic Regions.” ( With Lantern Illustrations.) 
Messrs A. Scott Dodd, T. Lindsay Galloway, and W. Forbes Gray signed the Roll, and 
were duly admitted Fellows of the Society. 
