584 Proceedings of Royal Society of Edinburgh. [sess. 
FIFTH ORDINARY MEETING. 
Monday , 6th January 1902. 
Professor Sir Wm. Turner, K.C.B., Vice-President, in the Chair. 
The following Communications were read : — 
1. A Theoretical Representation leading to general Suggestions bearing 
•on the Ultimate Constitution of Matter and Ether. By Mr J. Fraser, 
Ordnance Survey. Communicated by Professor Chrystal. pp. 26-64. 
2. On the Primary Structure of certain Palaeozoic Stems with the 
Dadoxylon Type of Wood. By D. H. Scott, M.A., Ph.D., F.R.S. 
Communicated by Professor I. Bayley Balfour, F.R.S. Trans., vol. 
40, pp. 331-365. 
3. A Continuant resolvable into rational Factors. By Thomas Muir, 
Esq., LL.D. pp. 105-112. 
4. Note on selected Combinations. By the same. pp. 102-104. 
5. A Suggested Modification of the Sign of Equality for use in 
Chemical Notation. By Dr Hugh Marshall, pp. 85-87. 
The Rev. John Henry Burn, B.D , Lionel W. Hinxman, B.A., 
and Mr James Russell were balloted for, and declared duly 
•elected Fellows of the Society. 
SIXTH ORDINARY MEETING. 
Monday, 20 ; th January 1902. 
The Right Hon. Lord Kelvin, G.C.V.O., President, in the Chair. 
Mr James Russell was admitted a Fellow of the Society. 
The following Communications were read : — 
1. On the Specification of Stress and Strain in the Mathematical Theory 
of Elasticity. By the President, pp. 97-101. 
2. On the Condition of the Iron in the Spleen. By Dr W. Brodie 
Brodie. pp. 21-25. 
3. Molecular Dynamics of a Crystal — 
(a) Stable and Unstable Homogeneous Assemblages. 
(b) Deviation from Homogeneousness in Surface-layers. 
( g ) Tensile Strength. 
(d) Cleavage. 
(Illustrated by Models.) By the President, pp. 205-224. 
4. The Theory of Jacobians in the Historical Order of its Develop- 
ment up to 1841. By Thomas Muir, Esq., LL.D. pp. 151-195. 
