of the Edinburgh Philosophical Jour--
nal, may be referred to, for the original
views which prompted the formation
of such tables, and the many
ing deductions that may be made from
them.

TABLE I. Exhibiting the Mean Temperatures in various Latitudes.

Remarks upon Table I.

peratures of Cumberland House and
Fort Enterprise, which are 10 degrees
of latitude apart.
The observations

for the other months in the Cumber-
land House column, were made within
the stockade of the fort, and a deduc-
tion of 1° has been made from each re-
corded observation, to compensate for
the radiation from the neighbouring
buildings an allowance which corre-
sponded with the few observations we
made upon the subject. The means
for some of the months were deduced
from three or more observations each
day, taking into account the length of
the intervals. In the rest of the months,
the means of the extremes have been
used, which differ only in a fraction of
a degree from the more correct mode
of taking the intervals into account.

The temperatures in the column for lat. 64° were (except those for the latter end of June, the month of July, and the beginning of August) taken at Fort Enterprise, in a shaded situation, on a northerly exposure, and not subject to any material radiation from warm buildings; and an addition of 0°.5 has been made to the registered temperatures, as a reduction to lat. 64°; Fort Enterprise being actually 28 miles north of that latitude. The temperatures for July, and the early part of August, in this column, having been observed during the journey from the parallel of 550, an allowance of from 10.5 to 1°.8 has been deducted for each degree of latitude, according to the situations of the places of observation. The temperatures for June, after the 10th, were

taken in lat. 65°, and have therefore been corrected for lat. 64° by an addition of 1°.5 Fahr.

With regard to the temperatures in the three remaining columns, Captain Parry observes, "that the thermometer, when placed on the shore, or on the ice, at a distance from the ship, invariably stood from 3° to 4° or 5°, and on some occasions 7° lower than the temperature registered on board;" and he in consequence deducts 3° from the mean temperature for the year. In the above table, an attempt has been made to proportion the compensation for the warm atmosphere of the ships, amongst the months, so that the greater allowance is made when the difference of temperature between the atmosphere and ship was greatest, or, in other words, in the coldest months. Thus, in July and August, when the radiation of the earth is supposed to be nearly equal to that of the ship, the registered temperatures are used without alteration. the other months, a deduction has been made, increasing from 2° to 5o, as their mean temperatures decreased. The annual means thus obtained are nearly the same with Captain Parry's corrected temperatures; but the differences betwixt the summers and winters a little exceed those given by his tables.

In

The means were obtained by Captain Parry from the twelve daily observations, made at intervals of two hours, or from 4380 observations in the year, and thus possess a degree of accuracy which is very rarely attained.

TABLE II. Showing the Distribution of Heat in the different Seasons, in various Latitudes.

TABLE IV. Showing the Increase of Vernal Temperature.

Fort Enterprise,... 64 0

Cumberland House, 53 57 +11.1 +34.0+49.1+59.9 23.0 ·11,1 + 5.1+32.1+ 46.6 16.2

TABLE V. Comparing the number of days that reach temperature 51°.8, and the Warmest Months of various Latitudes, and Isothermal Lines, (Lines of equal Annual Temperature).

1