192 Mr. J. F. Daniell on the 
kept at Melville Island by the expedition under the command of 
Captain Parry, I found that there was distinct evidence of the an- 
ticipated result. The barometer in that high latitude periodically 
rose at those hours whenit is known to fall in the southern degrees. 
The following tables present the monthly means arranged in the 
proper order for exhibiting the conclusion. 
In the first, including the winter half of the year, it will be ob- 
served that the mean temperature scarcely varied from noon to 
midnight: the effect of the remote equatorial expansion was there- 
fore unopposed, and the barometer constantly rose from 6 A.M. to 
6 P.M., in coincidence with the fall in the lower latitudes. From 
6 P.M. to 6 A.M. it as constantly fell. 
In the second, comprising that portion of the year when the sun 
was above the horizon, the daily variations of temperature were 
considerable, and the effect less regular, but nevertheless the baro- 
meter constantly rose from noon to 8 P.M., and then descended to 
midnight, 
TABLE II. 
Shewing the mean heights of the Barometer and Thermometer at four 
different hours of the Day at Melville Island. 
1819 6 A.M. Noon, 6P.M. Midnight. 
Bar. |Ther.|| Bar. |Ther. 
29.920 |4-22.7]] 29.890 |4+21.3 
29.840 |— 3.9]) 29.825 |— 5 
Bar. |Ther.|} Bar. 
29.884 |4-21.5]| 29.906 |4-23.7 
29.777 |— 4 || 29.808 |— 2.8) 
29.935 |—21 29.946 |—20.) 
29.874 |—23 29.872 |-21 
30.040 |—30.3)| 30.036 |—30 
29.741 |—32.8)]| 29.758 |—30.8 
10 days of March| 29.551 |—19.1]| 29.561 |—14.5 
September .. 
October.... 
ember .. 29.946 |—20.1)| 29.937 |—21.2 
December .. 29.881 |—21.1)| 29.893 |—21.6 
1820 
January.... 30.068 |—29.9)| 30.063 |—30.4 
February ... 29.782 |—32.6)| 29.771 |—33.5 
29.614 |—18.5|| 29.571 |—20.5 
——— 
ae ——— 
29, S644 29.8500 
+.0234 —.0144 
Means... | 29.8288 29,8410 
— .0212 | +.0122 
Difference . 
