of Edinburgh, Session 1864 - 65 . 293 
Pillans, Dr Archibald Eobertson, Dr Smyttan, Lieut.-G-eneral 
Swinburne, Dr E. D, Thomson, and Lord Wood. 
To replace these we reckon 16 new Fellows, — viz., Dr A. Crum 
Brown, Prof. Eobert Dyoe, Dr John Foulerton, Eev. John Hannah, 
Eobert Hutchison, Wm. Lindsay, Peter M^Lagan, J. D. Marwick, 
Eev. D. F. Sandford, Prof. Sellar, E. W. Thomson, Arthur Abney 
Walker, Dr William Wallace, Dr Alex. Wood, Eobert S. Wyld. 
Our roll, therefore, stands thus The number of Fellows in 
1863 was 274 (omitting Dr William Somerville, born at Minto in 
Eoxburghshire, 22d April 1771, and died at Florence, 24th June 
1860, whose name by mistake had been continued in the last list). 
Of these 274 we have lost by death 10, and by resignation 1, making 
in all 11, thus leaving 263. To which add the new Fellows, 16, 
making the whole number of Fellows of the Society at the com- 
mencement of this session 279, a larger number than has been on 
our list for many years. 
Baron G-iovanni Plana was born about 1790. After studying at 
the Polytechnic School, he was made Professor of Mathematics in the 
Military School of Alexandria, and then Professor of Mathematics 
in the University of Turin. In 1820 the King of Sardinia directed 
him to erect the observatory at Turin, of which he was made Director 
in 1822. He became Director of the Military School, Member of 
the Academy of Sciences at Turin, of which he was afterwards 
president, Chevalier of the Iron Crown, and of the Civil Order of 
Savoy, and member of various foreign academies. He was elected 
a Corresponding Member of the French Institute, and in 1860 one 
of the eight foreign Associates of that body. In 1820 he received 
from the Academy of Sciences in Paris the great mathematical 
prize for his “ Theory of the Lunar Motiens.” He was elected an 
Honorary Fellow of this Society on 19th January 1835. 
He married the niece of the celebrated Lagrange. He died at 
Turin on 20th January 1864. 
He is the author of many celebrated memoirs in the Transactions 
of the Turin Academy. The most important of them relate to the 
Constitution of the Atmosphere and Astronomical Eefraction, the 
Theory of Distribution of Electricity, the Theory of the Moon’s 
Motion, and the Perturbations of the Satellites of Jupiter and Saturn. 
