Meteorological Observations. 



xeiY 



Abstract of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month of December 187 '0 . 



Hourly Means, &c. of the Observations and of the Hygrometrical element* 



dependent thereon. 



Eange of the Tempera* 

 tare for each hour 

 during the month. 



Hour. 



O <A 



cj i-H CO 



.Range of the Barometer 



for each hour during 



the month. 



J? ° 



sj 



Max. 



Min. 



Diff. 



Max. 





Inches. 



Inches. 



Mid- 







night. 



30.029 



30.108 



1 



.021 



.095 



2 



.013 



.088 



3 



.008 



.081 



4 



.001 



.074 



5 



.011 



.091 



6 



.026 



.108 



7 



.050 



.124 



8 



.075 



.164 



9 



.096 



.181 



10 



.099 



.184 



11 



.081 



.170 



Noon. 



.050 



.136 



1 



.015 



.100 



2 



29.992 



.063 



3 



.978 



.051 



4 



.973 



.048 



5 



.979 



.057 



6 



.989 



.062 



7 



30.008 



.088 



8 



.025 



.100 



9 



,037 



.110 



10 



.040 



.120 



11 



.034 



.119 



Inches. 



29.864 

 .858 

 .855 

 .848 

 .823 

 .834 

 .842 

 .853 

 .884 

 .906 

 .919 

 .894 



.859 

 .825 

 .803 

 .789 

 .790 

 .796 

 .807 

 .829 

 .845 

 .869 

 .876 

 .867 



Inches. 



0.244 

 .237 

 .233 

 .233 

 .251 

 .257 

 .284 

 .271 

 .280 

 .275 

 .265 

 .276 



.277 

 .275 

 .260 

 .262 

 .258 

 .261 

 .255 

 .259 

 .255 

 .241 

 .244 

 .252 



62.8 

 62.1 

 61-5 

 60.9 

 60.3 

 59.8 

 59.3 

 59.2 

 61.7 

 64.8 

 68.5 

 71.3 



73.1 



74.5 

 75.4 

 75.5 

 74.2 

 72.7 

 69.8 

 67.8 

 66.5 

 65.3 

 64.3 

 63.5 



66.0 

 65.2 

 65.0 

 64.0 

 64,0 

 63.5 

 62.8 

 63.0 

 65.0 

 69.4 

 73.2 

 75.5 



77.1 



78.5 

 79.5 

 80.1 

 79.5 

 78.0 

 74.0 

 71.5 

 70.5 

 69.2 

 68.0 

 66.5 



Min. 



60.2 

 59.5 

 59.0 

 59.0 

 58.3 

 57.4 

 57.0 

 57.0 

 58.5 

 60.8 

 64,0 

 66.7 



69.0 

 69.8 

 71.6 

 72.4 

 70.7 

 69-7 

 67.4 

 65.8 

 64.5 

 63.0 

 62.0 

 61.2 



Diffi 



5.8 

 57 

 6.0- 

 5.0 

 5.7 

 6.1 

 5.8 

 6.0 

 6.5 

 8.6 

 9.2 

 8.8 



8.1 

 8.7 

 7.9 

 7.7 

 8.8 

 8.3 

 6.6 

 5.7 

 6.0 

 6.2 

 6.0 

 5.3 



The Mean Height of the Barometer, as likewise the Dry and Wet Bulb 

 Thermometer Means are derived from the observation* made at th» several. 

 ; hours during the month. 



