372 MR, S. A. HILL ON THE WINDS OF NORTHERN INDIA, AND THEIR 
Table XYIII.—Mid-day Pressures for certain Years, reduced to 10,000 feet 
and Gravity of lat. 45°. 
Station. 
1877. 1879. 
January. 
May. 
July. 
October. 
January. 
May. 
July. 
October. 
Ajmere . 
Sutna 
Hazaribagh 
Chakrata . 
Ranikliet . 
Darjiling . 
20-977 
20-900 
20-939 
20-840 
20-836 
20-918 
21-077 
21-003 
20-974 
20-878 
20-861 
20-865 
20-933 
20-829 
20-799 
20-780 
20-777 
20-820 
21-105 
21-006 
21-019 
20-944 
20-927 
20-988 
20-964 
20-921 
20-938 
20-825 
20-831 
20-852 
21-058 
20-994 
20-981 
20-879 
20-935 
20-865 
20-848 
20-719 
20"767 
20-742 
20-734 
20-815 
21-059 
20-932 
20-974 
20-913 
20-891 
20-956 
Station. 
i 8-0. 
1883. 
January. 
May. 
July. 
October. 
J anuary. 
May. 
July. 
October. 
Ajmere . . 
Sutna 
Hazaribagh 
Chakrata . 
Ranikhet . 
Darjiling . 
20-951 
20-876 
20-881 
20-820 
20-800 
20-821 
21-003 
20-993 
20-914 
20-847 
20-833 
20-848 
20-793 
20-728 
20-747 
20-739 
20-746 
20-820 
21-075 
21-022 
20-977 
20-943 
20-921 
20-956 
20-899 
20-880 
20-895 
20-713 
20-777 
20-814 
20-938 
20-994 
20-968 
20-795 
20-828 
20-820 
20-789 
20-716 
20-745 
20-748 
20-756 
20-805 
21-084 
20-983 
20-999 
20-942 
20-925 
20-948 
1834. 
Station. 
January. 
May. 
J uly. 
October. 
Ajmere . 
20-989 
21-039 
20-829 
21-052 
Sutna 
20-935 
21-009 
20-709 
20*964 
Hazaribagh. 
20-939 
20-962 
20-728 
20-902 
Chakrata 
20-833 
20851 
20-759 
20*965 
Ranikhet 
20-844 
20"855 
20-768 
20-902 
Darjiling 
20-877 
20-820 
20-810 
20-953 
These Tables suffice to prove that, even at a height of 10,000 feet, the pressure is 
subject to very considerable variations from year to year, both on the mountains and 
over the plains. The actual pressures observed were most variable at Ajmere, 
(allowance being made for the change in the elevation of the barometer), whilst on 
the mountains, as a rule, the variations were less than on the plains ; but the great 
variations at Ajmere, especially in January, are partly discounted by reduction to 
10.000 feet; high pressure at low levels being usually accompanied by, and doubtless 
the result of, low temperature. Accordingly, we find that the greatest range ol the 
pressure at 10,000 feet, in January, is shown by Chakrata, and the next greatest by 
Darjiling; and this indicates that if, as we have seen good reason to believe, the 
