194 Mr. J. F. Daniell on the 
Upon the return of the last expedition from the northern coast 
of America, I was “extremely anxious again to bring my hypothesis 
to the test of experience, and for this purpose was favoured upon 
application, with the loan of Captain Lyon’s Meteorological Jour- 
nal. This, as well as all other nautical registers which I have had 
an opportunity of examining, has been kept with the utmost pre- 
cision and neatness ; and it is highly gratifying to find so much 
attention to the interests of science amongst our naval officers, 
who have such opportunities of enlarging our acquaintance with the 
different climates of the globe. The periods of the day were 
almost as favourable as possible to the comparison, but the lati- 
tudes were not as far removed as that of Melville Island from the 
influence of variations of daily temperature. The following table 
presents the monthly means of the observations for two years, 
during which the Hecla was confined between the latitudes 
66° and 70°: 
TABLE IV. 
Shewing the Mean Heights of the Barometer and Thermometer at four 
different Hours of the Day on board H, M. 8. Hecla, between the 
Latitudes 66 and 70. 
A.M. 4 A.M.8 P.M. 4 P.M.8 
1821 Bar. Ther, Bar. Bar. Ther. Bar. 
August . .« || 29.835 33.5 || 29.846 || 29.848 39.9 |} 29.825 
September . || 29.958 29.8 || 29.974 || 29.973 34.3 |} 29.977 
October . . || 29.881 8.9 || 29.876 |} 29.889 17.6 |} 29.898 
November. || 30.166 2.7 || 30.156 || 30.165 12.6 || 30.159 
December . || 29.904 | —19.2 || 29.898 |} 29.914 | —11.5 || 29 918 
1822 
January . « || 29.921 | —26.9 || 29.924 |} 29.933 | —20 29.952 
February . . || 29.762 | —27.5 |} 29.746 |] 29.753 | —18.5 |] 29.761 
March . . . || 29.849 | —17 29,854 || 29.864 ] — 3.8 |} 29.852 
April . «. . |} 29.895 | — 0.2 }| 20.993 || 29.907 | 413.9 || 29.918 
May .. «|| 29.985 13.5 |} 29.957 || 29.973 | +31.5 |] 29.978 
June . . «|| 29.886 26.9 || 29.877 || 29,897 38.2 || 29.868 
July . . ¢|| 29.682 32.7 || 29.693 || 29.694 | 40.6 |] 29.702 
August . . || 29.643 31.5 || 29.636 || 29.661 36.5 |] 29.667 
September . |} 29.883 22.2 || 29.883 || 29.895 28.3 |} 29.894 
October . . || 29.967 10.7 |) 29.981 || 29.981 13.1 |} 29.985 
November, || 29.875 | —22.6 || 29.876 || 20.884 | —13.4 |] 29.882 
December + || 29.756 | —32.5 |) 29.739 || 29741 | —25,4 || 29.726 
1823 
January . .« || 29.877 | —20.2 || 29.902 || 29.898 | —10.6 |} 29.893 
February . , || 29.904 | —24.9 |) 29.906 |} 29.905 | —13.4 |} 29.907 
March . « || 30.950 | —24.1 | 30.055. || 30.050 | —12 30. 06L 
April . . «|| 29.957 | — 9 |) 29.955 || 29.957 | ++ 7.5 |] 29.954 
May . . «|| 29.929 | +16.9 |} 29.916 || 29.920 33.3 |] 29.921 
June . . . || 29.922 | — 23.4 |} 29.910. || 29.909 41.2 || 29.909 
Juky S << || 29.507 33.2 | 29.499 || 29.509 43.8 |} 29.508 
29.850 29.87% 
-L.G0S —.001 
Mean . . || 29.874 | 29.872 
; Difference || — .005 | — 602 
Naepeneetenpensener ninemsn 
