Meteoroloyicul Observations. Ixvii 
Abstract of the Results of the Hourly Meteorological Observations 
taken al the Surveyor Generals Office, Caleutta, 
in the mouth of September 1866. 
Hourly Means, &c. of the Observations and of the Hygrometrical elements 
dependent thereon. 
Ss | Range of the Barometer =. | Range of the Tempera- 
a oe for each hour during me ture for each hour 
Tab @ the month. ne during the month. 
Hour. = a S = 
ee@ | Max. | Min. | Dif. | 32 | Max. | Min. | Dif 
aa = | 
| 
Inches. | Inches. | hiches. | Inches. Cy) oy) Ce) 0 
Mid- | | 
night.| 29.681 | 29.807 | 29.537 | 0.270 82.2 84.6 79.0 5.6 
al i 805) = a9") 2286 5 820 | 842) a) 
.2 .663 .800 003 297 81.7 83.8 78.5 8.0 
3 .650 91 488 3803 81.4 83.2 78.4 4.8 
4, 648 | 781 469 312 81.2 83.0 78.2 4.8 
5) 656 | 798 AGA a4 81.1 82.8 78.0 4.8 
6 671 | B11 ATO .oa2 $1.0 83.0 78.2 4.8 
7 687 | 824 499 325 82.0 84.3 79.6 5.2 
8 105 — 846 U6 AO 83.8 87.0 81.3 5.7 
9 716 | .8d1 O19 O32 85.3 88.2 81.8 6.4 
10 BAS | 800 523 |  .332 86.3 Oz |) tie ts) 
11 408 S16 016 330 87.2 91.0 82.2 8.8 
Noon. 688 836 502 | .334 87.8 91.2 | 804); 10.8 
1 661 808 A481 27 88.2 92.8 81.2 | 11.5 
2 .633 182 AGL 21 88.1 92.8 80.0 | 12.8 
3 611 169 AAA, .o20 88.2 93.6 ey |) 128 
4, 603 | 758 448 310 87.7 93.0 81.4 |} 11.6 
5 GOL | 746 456 .290 86.8 92.6 80.2 | 12.4 
6 .622 .760 A480 .280 85.2 99.7 80.5 | 10.2 
7 642 |) 774 49) | 284 B44 89.0 | 80.5 | 8.5 
8 666 | 786 O19 267 83.6 88.4, 80.4 8.0 
9 686 | 801 50 | 200 &3.0 85.8 £0.0 5.8 
10 698 | 812 000 257 82.7 85.6 79.6 6.0 
11 .690 -809 000 200 82.4 85.0 79.2 5.8 
The Mean Height of the Barometer, as likewise the Dry and Wet Bulb 
Thermometer Means are derived from the observations made at the several 
hours during the month. 
