77 
1872. 
Difference from Mean. 
Inches. 
January . . 
February 
March 
April 
May 
June 
July 
August . . 
September 
October . . 
-0-315 
-0-205 
-0-139 
-0-032 
-0-050 
-0-107 
-0-017 
+ 0-006 
-0-161 
-0-195 
November -0-291 
December - 0-367 
Comparison of these departures below the average with 
the separate monthly values of the rainfall for 1872 does 
not show that the greatest rainfall occurred in those months 
in which the pressure was the most below the average, but 
the almost constant depression throughout the year cer- 
tainly does so. It is probable that if a longer and more 
complete register could be examined, that 1872 had a lower 
mean pressure than any year over a very long period, just 
as it had a greater rainfall than any year for a very long 
period, say 80 years. 
Barometer Means at 32° F., Corrected for Index Error, but 
STILL EeQUIRING THE EeDUCTION TO THE LeVEL OF THE SeA. 
Height of Barometer Cistern 123 feet above Mean Sea Level. 
Year. 
' Jan. 
Feb. 
Mar. 
April 
May. 
June. 
July. 
Aug. 
Sep. 
Oct, 
Nov. 
Dec. 
[Mean. 
ins. 
ins. 
ins. 
ins. 
ins. 
ins. 
ins. 
ins. 
ins. 
ins. 
ins. 
ins. 
1849 
1 
29-549 
29-784 
29-885 
29-779 
29-830 
29-758 
29-704 
29-843 
1850 
29-876 
29-752 
30-069 
29-580 
29-740 
29-890 
29-856 
29-958 
29-715 
29-775 
29-889 
1851 
29-540 
29-883 
29-573 
29-930 
29 720 
30-079 
29-701 
29-837 
30-137 
18^2 
29-524 
29-873 
30-072 
30-109 
29-819 
29-527 
29 '885 
• • . . 
29-793 
29-718 
29-420 
29-463 
1853 
29 527 
29-598 
29-801 
29-702 
29-843 
29-710 
29-671 
29-820 
29 923 
29-857 
1854 
29-562 
30 042 
30-160 
30-027 
29-648 
29-718 
29-789 
• • • • 
30-004 
29-682 
29-689 
29-7' 4 
1855 
30-044 
29-665 
29-548 
29-954 
29-729 
29 850 
29-7I8 
29-994 
29-475 
29-896 
29-709 
1856 
29-456 
29-877 
3i -069 
29-612 
29-686 
29-865 
29-797 
29-766 
29-637 
30 003 
29-938 
29 599 
1857 
29-656 
29-925 
29-723 
29-648 
29-835 
29-894 
29-829 
29-878 
29 845 
29-717 
30-001 
30-085 
1858 
30-145 
29-898 
29-787 
29-804 
29-950 
29-799 
29-854 
29-843 
29 846 
29-810 
29-727 
1859 
29 '963 
29-772 
29-758 
29 629 
29-904 
29 812 
l^-968 
29-680 
29-536 
29-804 
29-604 
1860 
29 464 
29.898 
29-622 
29-859 
29-779 
29-599 
29 -871' 
29-761 
29 810 
29-748 
29-527 
1861 
30-011 
29-656 
29-561 
30-053 
29-983 
29-823 
29-554 
29-666 
29-861 
29-520 
29 959 
1862 
29-667 
29-950 
29-522 
29-839 
29-735 
29-700 
29'715 
29-800 
29-888 
29-669 
29-831 
29-804 
29-760 
1863 
29-567 
30-101 
29 727 
29-814 
29-889 
29 720 
29-994 
29-710 
29 599 
29-583 
29-817 
29 864 
29-782 
1864 
29 957 
29-775 
29-503 
29-951 
29-885 
29 -778 
29-873 
29-950 
29-726 
29-737 
29-612 
29 >-78 
29-802 
1865 
29-392 
29-741 
29-784 
29-994 
29-729 
30-092 
29-790 
29-730 
30-100 
29-470 
29-714 
30-053 
29-799 
1866 
29 663 
29*524 
29-546 
29-790 
29-870 
29-782 
29-795 
29-619 
29-501 
29-965 
29-74-2 
29-728 
29-710 
1867 
29-508 
29-787 
29-696 
29-573 
29-782 
29-976 
29-733 
29-796 
29-905 
29-737 
30-173 
29-891 
29-796 
1868 
29-735 
29-918 
29-775 
29-791 
29-S35 
30-009 
29 950 
29-738 
29 735 
29-796 
29-851, 
29-290 
29 785 
1869 
29-779 
29-741 
29 745 
29 842 
29-712 
29-949 
29-930 
29-994 
29 -.5641 
29-897 
29-708! 
29-631 
29-791 
1870 
29-812 
29-735 
29-938 
29-989 
29-894 
29-981 
29-863 
29-865 
29-892 
29-534 
29-639 
29-793 
29 828 
1871 
29 665 
29-804 
29-859 
29 643 
29-947 
29-820 
29-664 
29-868 
29-784 
29-761 
29-864 
29-902 
29-798 
1872 
29-375 
29-599| 
29-620 
29-773 
29-763 
29-713 
29-788 
29-819 
29-640 
29-522 
29-479 
29-396 
29-624 
Means 
29-690 
29-804| 
29-759 
29-805 
29-813 
29-823 
29-805 
29-813 
29-801 
29-717 
29-770 
29-763| 
