Meteorological Observations, 



liv 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



hi the month of July 1870. 



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



dependent thereon. 



Range of the Tempera- 

 ture for each hour 

 during the month. 



Hour 



Mean Height of 



the Barometer at 



32° Faht. 



Range of the Barometer 



for each hour during 



the month. 





Max. 



Min. 



Diff. 



£ Max. 



Min. 



Diff. 





Inches. 



Mid- 





night. 



29.543 



1 



.534 



2 



.523 



3 



.512 



4 



.506 



5 



.511 



6 



.523 



7 



.539 



8 



.552 



9 



.560 



10 



.560 



11 



.554 



Noon. 



.539 



1 



.521 



2 



.501 



3 



4 



.482 

 .467 



5 



6 

 7 

 8 

 9 

 10 

 11 



.465 

 .477 

 .498 

 .518 

 .536 

 .551 

 .551 



Inches. 



29.670 

 .656 

 .644 

 .628 

 .624 

 .643 

 .649 

 .661 

 .672 

 .691 

 .695 

 .690 



.670 

 .659 

 .643 

 .622 

 .602 

 .599 

 .603 

 .639 

 .658 

 .668 

 .689 

 .693 



Inches. 



29.434 

 .416 

 .378 

 .365 

 .355 

 .351 

 .357 

 .372 

 .380 

 .386 

 .383 

 .372 



.357 

 .345 

 .335 

 .324 

 .329 

 .331 

 .362 

 .389 

 .406 

 .432 

 .445 

 .440 



Inches. 



0.236 

 .240 

 .266 

 .263 



.269 

 .292 

 .292 

 .289 

 .292 

 .305 

 .312 

 .318 



.313 

 .314 

 .308 

 .298 

 .273 

 .268 

 .241 

 .250 

 .252 

 .236 

 .244 

 .253 



82.2 

 81.8 

 81-5 

 81.2 

 80.9 

 80.7 

 80.7 

 81.7 

 83.2 

 84.4 

 85.6 

 86.7 



87.1 

 88.0 

 87.9 

 86.7 

 86.2 

 85.9 

 85.0 

 84.1 

 83.4 

 83.0 

 82.7 

 82.3 



84.4 

 84.0 

 83.2 

 83.0 

 83.0 

 82.5 

 82.5 

 83.8 

 86.7 

 88.3 

 90.5 

 92.0 



93.3 

 93.7 

 92.6 

 92.2 



92.0 

 91.0 



89.0 

 87.0 

 86.2 

 85.2 

 84.9 

 84.5 



80.0 

 79.8 

 79.0 



78.8 

 78.6 

 78.8 

 78.7 

 79.2 

 79.2 

 79.0 

 80.2 

 80.0 



80.4 

 81.2 

 81.2 

 80.5 



80.0 

 80-2 

 80.5 

 79.5 



78.8 

 78.5 

 79.0 

 78.8 



4.4 



42 

 4.2 

 4.2 

 4.4 

 3.7 

 3.8 

 4.6 

 7,5 

 9.3 

 10.3 

 12.0 



12.9 

 12.5 

 11.4 

 11.7 



12.0 



10.S 

 8.5 

 7.5 

 7.4 

 6.7 

 5.9 

 5.7 



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. 



