Meteorological Observation*. 



Ixvii 



Abstract of the Results of the Hourly Meteorological Observation* 



taken at the Surveyor General's Office, Calcutta, 



in the mouth of September I860. 



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

 dependent thereon. 







.Range < 



">f the Barometer 



rO 



Range of the Tempera- 





+a t 



for each hour c 



uring 



W £ 



ture for each hour 







the month 





b§ 



during 



the month. 



Hour. 









r? 2 











3cq22 



Max. 



Min. 



Diff. 



? 1 



Cv -J 



Max. 



Min. 



Diff. 













*« 











Inches. 



Inches. 



Inches. 



Inches. 











o 



o 



Mid- 



















night. 



29.681 



29.807 



29.537 



0.270 



82.2 



84.6 



79.0 



5.6 



1 



.672 



.805 



.519 



.286 



82.0 



84.2 



79.2 



5.0 



2 



.663 



.800 



.503 



.297 



81.7 



83.8 



78.8 



5.0 



3 



.655 



.791 



.488 



.303 



81.4 



83.2 



78.4 



4.8 



4 



.648 



.781 



.469 



.312 



81.2 



83.0 



78.2 



4.8 



5 



.656 



.798 



.464 



.334 



81.1 



82.8 



78.0 



4.8 



6 



.671 



.811 



.479 



.332 



81.0 



83.0 



78.2 



4.8 



7 



.687 



.824 



.499 



.325 



82.0 



84.8 



79.6 



5.2 



8 



.705 



.846 



.506 



.340 



83.8 



87.0 



81.3 



5.7 



9 



.716 



.851 



.519 



.332 



85.3 



88.2 



81.8 



6.4 



10 



.718 



.855 



.523 



.332 



86.3 



90.2 



82.2 



8.0 



11 



.708 



.846 



.516 



.330 



87.2 



91.0 



82.2 



8.8 



Noon. 



.688 



.836 



.502 



.334 



87.8 



91.2 



80.4 



10.8 



1 



.661 



.808 



.481 



.327 



88.2 



92.8 



81.2 



11.6 



2 



.633 



.782 



.461 



.321 



88.1 



92.8 



80.0 



12.8 



3 



.611 



.769 



.444 



.325 



88.2 



93.6 



80.7 



12.9 



4 



.603 



.758 



.448 



.310 



87.7 



93.0 



81.4 



11.6 



5 



.604 



.746 



.456 



.290 



86.8 



92.6 



80.2 



12.4 



6 



.622 



.760 



.480 



.280 



85.2 



90.7 



80.5 



10.2 



7 



.642 



.774 



.490 



.284 



84.4 



89.0 



80.5 



8.5 



8 



.666 



.786 



.519 



.267 



83.6 



88.4 



80.4 



8.0 



9 



.686 



.801 



.551 



.250 



83.0 



85.8 



80.0 



5.8 



10 



.695 



.812 



.555 



.257 



82.7 



85.6 



79.6 



6.0 



11 



.690 



.809 



.550 



.259 



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. 



