Meteorological Observations. Ixxv 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General’s Office, Calcutla, 
iw the mouth of October 1871. 
Latitude 22° 33’ 1” North. Longitude 88° 20’ 34” East. 
Height of the Cistern of the Standard Barometer above the sea level, 18.11 feet. 
Daily Means, &c. of the Observations and of the Hygrometrical elements 
dependent thereon. 
a) 
£3 _ | Range of the Barometer = % Range of the Tempera- 
es. during the day. As | ture during the day. 
3 on ae f 4 2 eee ee 
Date. HS 9. ~ ra re A 5 | | 
# 2% | Max. | Min. | Dif. | $4 | Max. | Min. | Diff. 
bre. e 
| 
Inches. | Inches. t Th chiaps Inches. 0 0 0 0 
1 29.756 | 29.804 | 29.704 0.100 84.8 | 90.4 | 81.5 8.9 
2 742 | 719A .677 alive $5.4 |) -S0:3; | SiO oa 
3 -748 .798 708 093 86.2. | 91.7 | 82.0 | 9.7 
4 ‘273| 827| .727| .100| 86.0 | 92.0 | 81.5 | 106 
5 -7A6 .803 .679 124 86.2 | 91.6 81.0 | 10.6 
6 714 .768 .652 116 86:2) | 91:8 |. 820 9.8 
7 .675 724 .629 095 85.1 , 90.6 | 80.5 | 10.1 
8 702 .760 -653 .107 §4.9 90.7 | 79.6 | 11.2 
9 “hed, .796 .667 .129 85.1 | 91.5 | 79.0 | 12.5 
10 .738 798 .684, 114 86.0 91.7 81.3 | 10.4 
ey .738 814 .683 131 82.8 85.3 79.5 | 58 
12 718 .800 .666 134 79.5 82.0 77.5 4.5 
13 | -765 834 .668 .166 80.5 84.0 | 78.0} 6.0 
14 .853 903 .795 108 80.8 | 84.3 | 78.5 5.8 
15 .892 947 841 .106 81.9 88.0 77.5 | 10.5 
16 Oh .977 .857 .120 83.6 | 89.8 | 79.4 | 10.4 
17 896 | .968| .831| .137| 82.9 | 89.0 | 79.0 | 10.0 
18 .888 951 .832 119 81.8 88.0 | 77.0 | 11.0 
19 905 .967 .855 112 81.2 | 885 75.8 | 12.7 
20 .918 .976 874 .102 79.9 | 87.4 73.5 | 13.9 
21 .899 .962 842 120 80.7 | 87.4 74.3 | 13.1 
22 .891 .957 .832 125 81.7 | 88.3 76.4 | 11.9 
23 .867 934 796 138 | 81.2 87.5 77.5 | 10.0 
24 .827 .888 179 .109 74.6 78.0 92.7 5.3 
25 .691 chad .627 144 72.7 | 745 | 71.5 3.0 
26 673 759 624 135 | 74.1 78.0 | 71.0] 7.0 
27 ‘738 | .856| .739} .117| 77.3 | 85.2 | 71.0| 142 
28 .821 .882 764 118 78.9 | 86.0 73.0 | 13.0 
29 .879 ».939 .836 103 | 79.1 | 86.0 73.7 | 12.8 
30 .887 .955 .826 129 | 78.7 | 85.0 73.5 ) 11.5 
31 .896 .960 S844. 116 | 78.3 71.8 | 14.0 
| 85.8 
The Mean Height of the Barometer, as likewise the Dry and Wet Bulb 
Thermometer Means are derived, from the hourly observations, made at the 
several hours during the day. 
