397 
1915-16.] Meetings of the Society. 
The following Communications were read : — 
1. On Old Red Sandstone Fossil Plants showing Structure from Rhynie Chert Bed, Aberdeen- 
shire. By Dr R. Kidston, F. R.S., and Professor W. H. Lang, F. R.S. 
2. Contributions to our Knowledge of British Palaeozoic Plants. Part I. Fossil Plants from 
the Scottish Coal Measures. By Dr R. Kidston, F.R.S. 
3. Exhibition of a Universal Sun Dial giving Greenwich or any Standard Mean Time ; and of 
a diagram giving Sunrise and Sunset in mean time for all Longitudes and Latitudes under any 
Daylight Saving Bill. By Dr W. B. Blaikig. 
4. On the heating of Field Coils of Dynamo- Electric Machinery. By Professor Magnus 
Maclean. 
5. Preliminary Communication on the Effects of Thyroid-feeding upon the Pancreas. By 
Dr M. Kojima, Staff-Surgeon in the Imperial Japanese Navy. Communicated by Professor 
Sir Edward A. Schafer, F.R.S. 
6. The Application of Operators to the Solution of the Algebraic Equation. By James 
Littlejohn, Esq. Communicated by the General Secretary. 
7. On Systems of Partial Differential Equations and the Transformation of Spherical Harmonics. 
By H. Bateman, Ph.D. Communicated by Professor Whittaker. 
Dr John E. Mackenzie and Dr W. F. P. M'Lintock signed the Roll, and were duly admitted 
Fellows of the Society. 
