Meteorological Observations. 



Ixx 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's OJJice, Calcutta 3 



in the month of September 1870. 



Hourly Means, &c. of the Observations and of the Hygrometrical elements 



dependent thereon. 



Hour. 



O c3 



c3 PR CO 



.Range of the Barometer 



aeh hour di 



the montli. 



for each hour during 



Max. 



Min. 



DifF. 



A ° 



p a 



Range of the Tempera- 

 ture for each hour 

 during the month. 



Max. 



Min. 



DifF. 



Mid- 

 night. 



1 



2 



3 



4 



5 



6 



7 



8 



9 

 10 

 11 



Noon, 

 1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 



Inches. Inches. 



29.713 

 .703 

 .694 

 .686 

 .682 

 .692 

 .705 

 .724 

 .745 

 .757 

 .755 

 .745 



.724 



.698 

 .670 

 .651 

 .644 

 .648 

 .661 

 .680 

 .702 

 .723 

 .733 

 .727 



29.851 

 .840 

 .830 

 .818 

 .813 

 .821 

 .833 

 .863 

 .870 

 .890 

 .894 

 .880 



.861 



.825 

 .797 

 .792 

 .788 

 .786 

 .794 

 .812 

 .829 

 .842 

 .844 

 .853 



Inches. 



29.546 

 .532 

 .525 

 .513 

 .511 

 .524 

 .536 

 .538 

 .568 

 .592 

 .597 

 .581 



.559 

 .539 

 .506 

 .492 



.487 

 .490 

 .512 

 .529 

 .549 

 .581 

 .585 

 .561 



Inch 



0. 



305 

 .308 

 .305 

 .305 

 .302 

 .297 

 .297 

 .325 

 .302 

 .298 

 .297 

 .299 



.302 

 .286 

 .291 

 .300 

 .301 

 .296 

 .282 

 .283 

 .280 

 .261 

 .259 

 .292 



81.3 

 81.0 

 80-8 

 80.6 

 80.4 

 80.2 

 80.1 

 81.0 

 82.8 

 81,1 

 85.4 

 86.2 



86.9 

 87.1 

 86.9 

 85.9 

 85.5 

 85.0 

 83.7 

 83.0 

 82.7 

 82.3 

 81.9 

 81.6 



84.0 

 83.4 

 82.7 

 82.7 

 82.5 

 82.5 

 82.0 

 83.0 

 86.0 

 88.0 

 89.0 

 90.6 



91.5 

 92.0 

 91.7 

 91.2 

 91.5 

 91.3 

 89.9 

 88.5 

 87.7 

 87.0 

 86.2 

 84,5 



78.0 

 78.0 

 78.0 

 78.0 

 78.0 

 77.9 

 77.8 

 78.7 

 78.7 

 79.0 

 80.4 

 80.0 



81.4 



80.5 

 79.5 

 80.2 

 79.0 

 78-6 

 78.7 

 7S.5 

 79.5 

 78=5 

 78.5 

 78.0 



6.0 

 54 



4,7 

 4.7 

 4.5 

 4.6 

 4,2 

 4.3 

 73 

 9.0 

 8.6 

 10.6 



10.1 



11.5 



12.2 



11.0 



12.5 



12.7 



11.2 



10.0 



8.2 



8.5 



7.7 



6.5 



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 mouth. 



