hat in the cellars of the observatory, at Paris, at the depth
of sixty-seven and a half feet, in fifty years, the temperature has
never varied a tenth of a degree from 53 deg. 28', in all that period,
Summer or Winter.

Mr. Parkes gives the results of a valuable series of experiments, in
which he compared the temperature of drained and undrained portions of a
bog. He found the temperature of the undrained portion to remain
steadily at 46 deg., at all depths, from one to thirty feet; and at seven
inches from the surface, the temperature remained at 47 deg. during the
experiments. During the same period, the temperature of the drained
portion was 48-1/4 deg. at two feet seven inches below the surface, and at
seven inches, reached as high as 66 deg. during a thunder-storm; while, on a
mean of thirty-five observations, the temperature at the latter
depth was 10 deg. higher than at the same depth in the undrained portion of
the bog.

We find in the "Agriculture of New York," the results of observations
made at Albany and at Scott, in that State, in the year 1848, upon
temperature at different depths. The condition of the soil is not
described, but it is presumed that it was soil naturally drained in both
cases. A few of the results may give the reader some idea of the range
of underground temperature, as compared with that of the air.

Temperature at Albany at two feet depth.
" " " highest August 17 and 18, 70 deg.
" " " lowest February 28, 32-3/4 deg.
----
" " " Range, 37-1/4 deg.
----
" " " at four feet depth.
" " " highest July 29, 64-1/2 deg.
" " " lowest February 25, 35-1/2 deg.
----
" " " Range, 29 deg.
----
" " " of the air, February 12, -3 deg.
" " " " " August, 3, P. M., 90 deg.
----
" " " Range, 93 deg.

Temperature at Scott at two feet depth.