42 



Meteorological Observations on Parisnatli Hill. [No. 1. 



This excess cannot be ascribed to an excess of the tension of 

 moisture in the same direction. The mean tension of moisture of 

 the night is, during the cold months equal to or slightly greater than 

 that of the day. 



In table XIV I have given the mean daily ranges of temperature 

 for the same years and months. 



Table XIV. — Daily range of temperature in ° C. 



Bombay. 



Jan. 



Feb. 



March. 



April. 



May. 



June. 



1849 

 1850 



Mean. 

 Calcutta. 



1856 



7.4 



7.4 



7.4 

 9.3 



6.7 

 9.1 



7.9 



9.8 



65 

 6.5 



6.5 



7-8 



6.1 

 5.7 



5.9 



75 



5.2 

 5.3 



5.2 



6.0 



2.9 

 4.1 



3.5 



3.7 



Bombay. 



July. 



August. 



Sept. 



Oct. 



Nov. 



Dec. 



Year. 



1849 

 1850 



Mean. 

 Calcutta. 



1856" 



2.7 



2.8 



2.7 

 3.3 



2.8 

 3.5 



3.1 



3.0 



2.6 



4.0 



3.3 



3.8 



5.8 

 5.8 



5.8 



4.1 



7.3 



7.8 



7.5 

 7-0 



7.9 

 7.3 



7.6 



9.0 



5.3 

 5.6 



5.4 



6.2 



If their variation from month to month is not always proportion- 

 ate to the variation in the excess of pressure, they show at least, 

 that in those mouths for which the excess of the pressure of the day 

 is smallest, June, July and August, during the rains, the range of 

 temperature is also at a minimum, and increases, as the former, in 

 the cold and hot seasons. 



Supposing that the excess of barometrical pressure during the day 

 be owing to the amount of daily precipitation by condensation, the 

 average daily quantity of the latter would in round numbers cor- 

 respond to about the following quantities of water : 



Bombay 1849, 0.160 Inches. 



1850, 0.180 „ 

 Calcuttal856, 0.200 „ 



