78 Cambridge Philosophical Society:—Sir John F. W. Herschel 
Gen. 11. Carscora. Lam. Brown. 
1. C. diffusa. 
2. C. decussata. 
3. C. pusilla. 
Gen. 12. Exacum. L. Brown. 
1. E. pedunculatum. 
2. E. tetragonum. 
Gen. 13. Stevoetia. Reichend. 
1. S. verticillata. 
_—_-—_—. 
CAMBRIDGE PHILOSOPHICAL SOCIETY. 
At the anniversary meeting on Friday, November 6th, 1835, the 
following officers were elected for the ensuing year : 
Dr. Clark, Trinity College, President ;— Professor Cumming, Tri- 
nity College ; Professor Sedgwick, Trinity Coliege ; Dr. F. Thackeray, 
Emanuel College, Vice-Presidents ;— Kev. G. Peacock, Trinity Coi- 
lege, Treasurer :—Rev. Professor Henslow, St. John’s College; Rev. 
W. Whewell, Trinity College; Rev, J. Lodge, Magdalen College, 
Secretaries ;—W. Hopkins, Esq., St. Peter’s College ; Rev. J. Hymers, 
St. John’s College; Dr. Haviland, St. John’s College; Rev. J. J. 
Smith, Caius College; Rev. S. Earnshaw, St. John’s College, Old 
Council ;—Rev. L. Jenyns, St. John’s College; Rev. R. Murphy, 
Caius College ; Rev. A. Thurtell, Caius College; C. C. Babington, 
Esq-, St. John’s College; Rev. H. Philpott, Catherine Hall, New 
Council. 
November 16.—After various presents of books and objects of 
natural history had been announced, a Memoir was read by the 
Rev. R. Murphy, ‘On the Resolution of Equations of Finite Differ- 
ences. 
Extracts were then read of letters from Sir J. Herschel to the Rev. 
W. Whewell, containing various meteorological observations, and 
especially some tending to show that the height of the barometer at 
the equator is less by about a quarter of an inch than it is at twenty 
or thirty degrees from it. 
The following are a portion of the extracts here referred to : 
««The barometer certainly has a permanently and very decidedly 
lower mean ievel at and near the line. The strong upward current 
due to the circulation of the trades can alone account for this. Of 
the general fact I have no doubt, and however difficult it is to observe 
the barometer on shipboard, from the unusual quietness of our pas- 
sage, I think I can come pretty near to its true difference from that 
in our latitudes. The depression at the equator below that in lat. 
20° may I think be stated at 0'2 nearly. 
«<These are the results of a series of barometrical observations, 
made at my request by Sir E. Ryan, in his voyage to Calcutta from 
this place. The barometer is reduced to 32° F., and to the Royal 
Society's Standard, by careful comparison with my Troughton’s ba- 
rometer, 
