CONTENTS 
OF 
No. XXIV. 
Page 
Art. I. Remarks on the Climate and Vegetable Productions 
of the Hudson’s Bay Countries. By John Ri- 
chardson, M.D. Member of the Wernerian Natu- 
ral History Society, - - 197 
H. Tables of Summer Temperatures observed in Spitzber- 
gen by Captain Franklin and Captain Buchan, 232 
HI. Table of the Temperature of the Sea, at various 
depths, made during Captain Franklin’s Voyage 
to Spitzbergen with Captain Buchan, - 233 
JV. On the Fog of the Polar Regions. By Professor 
Hansteen. (Concluded from p. 93- of this Vo- 
lume), - - _ 235 
V. On the British Testaceous Annelides. By the Rev. 
John Fleming, D.D. F.R.S.E. and M.W.S., Mi- 
nister of Flisk, - - 238 
VI. New Corrections for the Effects of Humidity on the 
Formula for measuring Heights by the Barometer. 
By Adam Anderson, A.M. F.R.S.E. Rector of 
the Academy of Perth, ‘ - - 248 
VI I. On the Principles and Practice of Ventilating and 
Warming Buildings. By Thomas Tredgold, Esq. 
Civil Engineer, and Honorary Member of the In- 
stitution of Civil Engineers. (Concluded from 
