144 Learned Societies. 
Secretaries. 
C. Babbage, Esq. M.A. F.R.S. L. & E. 
F. Baily, Esq. F.R.S. & L.S. 
J. F. W. Herschel, Esq. M.A. F.R.S. L. & E. ( Foreign.) 
Council. 
G. Birkbeck, M.D. Maj. Gen, John Rowley, Roy. 
B. Gompertz, Esq. F.R.S. Eng. F.RS. 
O. G. Gregory, LL.D. J. South, Esq. F.R.S. & LS. 
S. Groombridge, Esq. F.R.S. | E. Troughton, Esq. F.R.S. 
J. Horsburgh, Esq. F.R.S. L. & E. 
The Names, under each Office, are arranged alphabetically. 
ACADEMICAL SOCIETY OF THE LOWER LOIRE. 
This society has proposed a prize consisting of a gold medal 
value 300 francs, for the best answer to questions respecting the 
yellow fever. [It is required to trace its origin, to specify its 
causes and nature; to describe the state of the atmosphere and 
local circumstances where it prevails; to notify its identity or 
otherwise with similar fevers in Europe, &c.; to distinguish 
whether it be complicated with any other malady. There’is also 
a second subject relating to the means for preventing its spread- 
ing, the proper modes of quarantine, &c. The memoirs to be 
sent, post free, to the secretary of the society before the Ist of 
May 1822. Each to bear a motto with a tepetition in a sealed 
paper, containing, as usual, the author’s name and address. 
ROYAL SOCIETY OF MEDICINE AT MARSEILLES. 
This society has proposed the following questions: 1. To de- 
termine the structure and functions of the spinal marrow. 2. To 
describe the nature, causes, symptoms, and treatment of the 
diseases by which the spinal marrow is affected. It is desired 
that clinical observations and pathological anatomy should be 
made the principal objects of the memoirs. They may be written 
in Latin or French. The extent of time allowed is till July 1822, 
and the prize a gold medal. 
, 
SOCIETY OF SCIENCES AND ARTS AT METZ. 
When the nozzle of a blowing machine is placed at a certain 
distance from that of the tuyére, a stronger current of air is ob- 
tained than when both are placed together, as is frequently done. 
This effect is produced by various causes dependent on the elastic 
nature of the fluid in motion, and of the surrounding atmosphere. 
The Society of Sciences and Arts at. Meta have founded the 
following prize question on this experiment: ‘ What are the 
changes necessary to be made iu the tuyére of blowing machines, 
to 
