12 



Meteorological Observations on Parisnath Hill. [No. 1. 





7t 



B 



"3a p 



3d April. 

 12 Noon. 



4585.1 





ice of Height between Calcutta 

 lancee. 



4th April. 



2 p. m. 935.1 



3 „ „ 938.0 



# The height opposite 10 a. m. on the 

 3rd was derived from the observation at 10 

 h. 10 ra. 





-3 +2 

 § 1 



1st April. 

 7h.40ra 



A. M. 



4452.0 



o § •* 





a 

 pL 



V 

 13 



.SPg 



3d April. 

 12 Noon. 



510.5 





<cj 

 1 



§1 



1st April. 

 7h.40m. 



A. M. 



429.4 



2 ->o 

 rr 1 



~ So 



t-> P- 



a 



"E. 

 s 



cu 



CD 



i 



es 



S3 

 o 



"ci 

 O 



«3 



4010.7 

 4023 7 

 4031.3 

 4058.4 







* 



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 • • CM Tf i >. .000:0 — — i Oi t^. no ^r Tf ^? 



ooo oo^n^-ir-orz-rooo 



^^ Tp Tp Tj* "^1 ^* "^ , T^ ^}* ^* "^J1 Tj* ^s? "^* 





Oh 

 CO 



jo cm »o t>. io co ri; o h q in i>» co 



oioiaioiTt-.— iio»ocmtfo . r-* . oi . . 

 o •— < <M CM ^ lo t^ co en go as . >o . o . . 



ooooooooooo o o 

 -cfTj"^Tr'^f |T T T 3 ,, cr"^'rrTj< ^r 1 ^j» 









CD 



s 



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lOH § "- 1 <S> CO ^P iO CO t>* 00 Oi o 



The resulting height becomes greater as the day advances and 

 reaches its maximum at 3 and 4 p. m., about which time the difference 

 between the temperatures of the two stations is also greatest. 

 It decreases towards evening and is smallest about the time of the 

 lowest observed temperature at 6 a. m. It is well known that 

 the cause of this variation lies in the difficulty of obtaining at all 

 hours the real value of the mean temperatures of the column or 

 stratum of air between the two stations. 



A solid body and generally the solid surface of the ground, cools 

 and heats quicker than the air in contact with it. In other words, 

 it becomes hotter and colder in the same space of time, if exposed 

 to the same heating and cooling influences — the sun during the day 

 or a clear sky at night. This docs not necessarily affect the mean 



