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





Cloud proportion at 8 a. m. 



Station. 



















Jany. 



Jany. 



Feby. 



Peby. 



Feby. 



Feby. 



Peby. 





30th. 



31st. 



1st. 



2nd. 



3rd. 



4th. 



5th. 



Murree 



10 



10 



10 



4 







10 



8 



Simla 



10 



1 



2 



9 















Lahore 



10 











10 















Eoorkee 



10 







3 



2 















Lucknow 



7 



8 











3 











Patna 



10 



10 











9 











Burdwan 



5 



8 























Calcutta 























7 







The second table shews that the amount of aqueous vapour pressure 

 in the air was greatest in the Punjab on the 30th and in the Gangetic 

 plain on the 31st. A large decrease occurred on the 1st in the Punjab, 

 on the 2nd in the Gangetic plain, and the decrease continued until the 

 end of the period in Bengal. The lowest aqueous vapour pressure 

 was registered in the North- Western Provinces on the 4th and in 

 Bengal on the 5th, and the amount of vapour was only from one -half to 

 one-third of that present in the air on the 31st. This very great change 

 accompanied the extension of west and north-west winds across the 

 Gangetic Valley into Bengal. 



Two more remarkable illustrations might be given from the meteo- 

 rology of recent years of the remarkable weather changes which occur 

 in the rear of cold weather storms in Northern India and follow their 

 disappearance (viz.,the periods February 1st to 6th, 1886 and February 5th 

 to ]2th, 1887). The last week of January or first week of February is, 

 in at least two years out of three, one of stormy weather in the hill dis- 

 tricts, and some of the most severe snow-storms of recent years have oc- 

 curred during that fortnight. The second of these two periods, viz., 

 February 5th to 12th, 1887 is selected in further illustration of the 

 peculiar features of the fine weather immediately succeeding severe 

 stormy weather in Northern India and the Himalayan region. 



The disturbance which gave this stormy weather first appeared as 

 a depression in the South-west Punjab on the 27th of January. It in- 

 tensified on the 28th and moved eastwards. It passed into the Himalayan 

 region of the North-Western Provinces on the 29th and 30th. Heavy 

 snow fell in the North-West Himalayas and Afghan highlands at this 

 time, and extended eastwards to the Eastern or Assam Himalayas. 

 Stormy and cloudy weather with much snow continued over the whole 

 Upper Himalayan region until the 7th, when the weather suddenly cleared 



