30 John Eliot — On the occasional Inversion of the Temperature [No. 1, 



The following gives the minimum temperature on these nights at 

 Simla and at a large number of stations in the plains. 













Difference 





Hill 



station. 



Minimum 



Plain 

 station. 





Minimum 



between 



Date. 



tempera- 

 ture. 



Province. 



tempera- 

 ture. 



hills and 

 plains. 







A. 







B. 



B— A 



Night of 















30th Jan. 















1889. 



Simla 



28'6° 



Ludliiana 

 Lahore 



Lucknow 

 Allahabad 



Patna 

 Calcutta 



> Punjab 

 N.-W. P. 



> Bengal 



53-8° 

 49 0° 



58-9° 

 59 -2° 



598° 

 62-3° 



25-2° 

 20'4° 



30 3° 

 306° 



31-2° 

 337° 









Jeypore 



Rajputana 



54-1° 



25'5° 









Nagpur 



Central Pro- 

 vinces 



62-3° 



337° 









Deesa 



Bombay 



57-9° 



29-3° 









Jacobabad 



Sind 



41-1° 



12o° 



Do. of 31st 















Jan. 1889. 



Simla 



24-0° 



Lahore 



Punjab 



42-1° 



18-1° 









Lucknow 



|n.-w. P. 



56-9° 



• 32-9° 





















Allahabad 



59-7° 



35 7° 









Patna 



} Bengal 



59-8° 



35'8° 









Calcutta 



) 



618° 



37-8° 









Jeypore 



Eajputana 



41-2° 



17-2° 









Nagpur 



Central Pro- 

 vinces 



593° 



35-3° 









Deesa 



Bombay 



57-9° 



339° 









Jacobabad 



Sind 



42-1° 



18-1° 



These figures indicate that over the whole of the plains of Northern 

 India the minimum night temperature was from 20° to 30° higher than 

 at the hill stations of Upper India. These very large differences (in the 

 opposite directions to those discussed in the previous case) were mainly- 

 due to the abnormally low temperature in the hills, and in part to the in- 

 creased night temperature in the plains due to the presence of clouds 

 diminishing radiation. The characteristic features of these periods will 

 be best shewn by examining the whole of the temperature data of the 

 same stations as in the previous case. 



