418 METEOROLOGY OF SIKKIM. Appendix F. 



nocturnal radiation are accurate as far as they go, that is to say, 

 they are absolute temperatures taken by myself, which may, I believe, 

 be recorded in any year, but much higher are no doubt often to be 

 obtained. The dew-points and saturations are generally calculated 

 from the mean of two day observations (10 a.m. and 4 p.m.) of the 

 wet-bulb thermometer, together with the minimum, or are taken 

 from observations of Daniell's hygrometer ; and as I find the mean 

 of the temperature of 10 a.m., 4 p.m., and the minimum, to coincide 

 within a few tenths with the mean temperature of the whole day, 

 I assume that the mean of the wet-bulb observations of the same 

 hours will give a near approach to that of the twenty-four hours. 

 The climate of Dorjiling station has been in some degree altered by 

 extensive clearances of forest, which render it more variable, more 

 exposed to night frosts and strong sun-heat, and to drought, the 

 drying up of small streams being one direct consequence. My own 

 observations were taken at Mr. Hodgson's house, elevated 7,430 feet, 

 the position of which I have indicated at the commencement of this 

 section, where the differences of climate due to local causes are 

 sufficiently indicated to show that in no two spots could similar 

 meteorological results be obtained. At Mr. Hodgson's, for instance, 

 the uniformity of temperature and humidity is infinitely more 

 remarkable than at Dr. Chapman's, possibly from my guarding more 

 effectually against radiation, and from the greater forests about 

 Mr. Hodgson's house. I have not, however, ventured to interfere 

 with the temperature columns on this account. 



