448 DECREMENT OF TEMPERATURE IN ASCENDING. Appendix I. 



winds, the same region is probably hotter than Calcutta, there being 

 but scanty vegetation, and the rain-fall being moderate. 



In the following observations solitary readings are always rejected. 



I, — Summer or Rainy Season observations at Dorjiling. 



Observations taken during the rainy season of 1848, at Mr. Hodgson's (Jillapahar, 

 Dorjiling) alt. 7,430 feet, exposure free to the north east and west, the slopes 

 all round covered with heavy timber; much mist hence hangs over the 

 station. The mean temperatures of the month at Jillapahar are deduced 

 from horary observations, and those of Calcutta from the mean of the daily 

 maximum and minimum. 



Month. 



No. of Obs. 



at 

 Jillapaliar. 



Temp. 



Temp. 

 Calcutta. 



Equiv, 



of 

 1° Fahr. 



July .... 



August . . . . 



September 



October . . . . 



284 

 378 

 407 

 255 



61-7 

 61-7 

 58-9 

 55-3 



86-6 

 85-7 

 84-7 

 83-3 



364 feet 

 346 „ 

 348 „ 

 316 „ 





1,324 



... 



Mean 



344 feet 



II. — Winter or dry season observations at Dorjiling. 



Observations taken at Mr. J. Muller's, and chiefly by himself, at 

 " the Dale ;" elev. 6,956 feet ; a sheltered spot, with no forest 

 near, and a free west exposure. 103 observations. Months: 

 November, December, January, and February .... 



Observations at Dr. Campbell's (Superintendent's) house in April ; 

 elev. 6,950 feet ; similar exposure to the last. 13 observations 

 in April 



Observations by Mr. Muller at Colinton; elev. 7,179 feet; free 

 exposure to north-west ; much forest about the station, and a 

 high ridge to east and south. 38 observations in winter months 



Miscellaneous (11) observations at Leebong ; elev. 6000 feet ; in 

 February ; free exposure all round . . . . . . 



Miscellaneous observations at "Smith's Hotel," Dorjiling, on a 

 cleared ridge ; exposed all round ; elev. 6,863 feet. April and 

 May 



Mean of winter observations 

 Mean of summer „ 



1° =31 3 ft. 



1° = 308 ft. 



1° = 



1° = 



290 ft. 

 266 ft. 



1° = 252 ft. 



1° 

 1° 



286 

 344 



Mean 



310 



