512 
Proceedings of Royal Society of Edinburgh. [sess. 
2. On the Retro-colic Fossse and the Pericsecal Folds and Fossae. By 
Richard Berry, M D., F.R.C.S. Ed. Communicated by Dr Noel 
Paton. 
3. A Research into the Chemical Nature of the Nucleins and Paranu- 
cleins of the Animal Cell. By T. H. Milroy, M.D., B.Sc. Communi- 
cated by Professor Rutherford. (Abstract.) pp. 254-258. 
4. On the Expression of any Bordered Skew Determinant as the Sum 
of Products of Pfaffians. By Dr Thomas Muir. pp. 342-359. 
5. On Electrification of Air by Rontgen Rays. By The Right Hon. 
Lord Kelvin, Dr J. C. Beattie, and Dr M. Smoluchowski de Smolan. 
pp. 393-397. 
THIRD ORDINARY MEETING. 
Monday , 4 111 January 1897. 
Professor Clirystal, LL.D., Vice-President, in the Chair. 
The following Communications were read : — - 
1. Report of Intermediate Station on Ben Nevis. Bv T. S. 
Muir, M.A. Communicated by Dr Buchan, pp. 280-296. 
2. On Intermediary Links between Man and the Lower Animals- 
By Dr Munro. {Abstract.) pp. 249, 250. 
FOURTH ORDINARY MEETING. 
Monday , 18 tin January 1897. 
Sir Arthur Mitchell, K.C.B., LL.D., Vice-President, 
in the Chair. 
The following Communications were read : — 
1. On the Ocean Ranger Reef of the South-West Pacific. By Di- 
John Murray. 
2. On the Physical Conditions of the Ocean to the East of the 
Australian Continent. By Dr John Murray. 
3. Further Note on Magnetic Strains. By Dr C. G. Knott. 
4. On the Physical Properties of the Electro-magnetic Medium. By 
Professor Tait. 
5. On Osmotic Pressure against an ideal Semi-permeable Membrane. 
By the Right Hon. Lord Kelvin, President, pp. 323-325. 
6. On a Differential Method for Measuring Differences of Density and 
of Vapour-Pressures of Liquids at one Temperature and at Different 
Temperatures. By the Right Hon. Lord Kelvin, pp. 429-432. 
