IV 



Meteorolog ica I Observa lions. 



Abstract of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month of January 1869. 



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

 dependent thereon. — (Continued.) 



Hour. 



o 



H 



-f-3 



> 

 o 



-8 



pq 



b • 



-^ 

 d 

 "o 

 Ph 



o 

 ft 



rtf 



g 



P 



a 



o 



ft 

 S 



■a 



«| 



£Ph 



Mean Elastic force of 

 Vapour. 



Mean Weight of Vapour 

 in a Cubic foot of air. 



Additional Weight of 

 Vapour required for 

 complete saturation. 



Mean degree of Humi- 

 dity, complete satura- 

 tion being unity. 





o 



o 



o 



o 



Inches. 



T. gr. 



T.gr. 





Mid- 



















night. 



62.2 



4.0 



59.0 



7.2 



0.506 



5.61 



1.51 



0.79 



1 



61.8 



3.7 



58.8 



6.7 



.503 



.57 



.41 



.80 



2 



61.4 



3.6 



58.5 



6.5 



.498 



.52 



.35 



.80 



3 



61.2 



3.2 



58.3 



6.1 



.494 



.49 



.25 



.82 



4 



60.9 



3.0 



58.2 



5.7 



.493 



.48 



.15 



.83 



5 



60.5 



2.9 



57.9 



5.5 



.488 



.42 



.11 



.83 



6 



60.0 



2.8 



57.5 



5.3 



.481 



.38 



.03 



.84 



7 



59.7 



2.8 



57.2 



5.3 



.476 



.32 



.03 



.84 



8 



60.4 



3.1 



57.6 



5.9 



.483 



.37 



.18 



.82 



9 



62.1 



4.5 



58.5 



8.1 



.498 



.51 



.70 



.76 



10 



63.8 



6.3 



58.8 



11.3 



.503 



.53 



2.50 



.69 



11 



64.8 



8.6 



57.9 



15.5 



.488 



.31 



3.56 



.60 



Noon. 



65.4 



10.0 



58.4 



17.0 



.496 



.39 



4.04 



.57 



1 



65.7 



11.0 



58.0 



18.7 



.489 



.30 



.50 



.54 



2 



66.3 



11.3 



58.4 



19.2 



.496 



.37 



.70 



.53 



3 



66.1 



11.9 



57.8 



20.2 



.486 



.26 



.93 



.52 



4 



65.8 



11.5 



57.7 



19.6 



.485 



.24 



.74 



.53 



5 



65.9 



10.2 



58.8 



17.3 



.503 



.46 



.17 



.57 



6 



65.9 



7.8 



60.4 



13.3 



.530 



.80 



3.16 



.65 



7 



65.5 



6.3 



60.5 



11.3 



.532 



.84 



2.61 



.69 



8 



64.7 



5.7 



60.1 



10.3 



.525 



.77 



.33 



.71 



9 



64.1 



5.0 



60.1 



9.0 



.525 



.78 



.00 



.74 



10 



63.6 



4.5 



60.0 



8.1 



.523 



.78 



1.77 



.77 



11 



63.0 



4.2 



59.6 



7.6 



.516 



.71 



.64 



.78 



All the Hygrometrical elements are computed by the Greenwich Constants. 



