134 MR. W. B. HEMSLEY ON THE 
During the months of August and October there was no pre- 
cipitation whatever, and during three other months less than a 
millimetre per month. The relative humidity for the year was 39 ; 
the lowest, 19, in August, and the highest, 56, in January. The 
mean temperature for the year was 30°02 Fahr. January was 
the coldest month, with amean of —12°'8; and July the hottest, 
with a mean of +62°°2. The extreme highest temperature was 
+81°5, and the lowest —47%2, giving a range of 128°-7 Fahr. 
The annual rainfall at Leh, in about 77° 30’ and 34° 25’, 
at an altitude of 11,278 ft., is given as 81 millimetres, equal 
3°1 inches. 
Urga is in north-west Mongolia, in about 107° and 48°, and 
a degree south of Kiachta, at an altitude of 4376 ft. Here the 
average fall of five years’ observations is a trifle over 7°5 inches. 
The average annual rainfall of Kashgar(1894-6) was 4°45 inches. 
This is in about 76° 2’ and 39° 27’, at an altitude of 4000 ft. 
Captain M.S. Wellby’s ‘Through Unknown Tibet,’ pp. 429- 
431, contains some Meteorological Observations, which we re- 
produce in a condensed form. Wellby and Malcolm’s route 
across Tibet was between 34° and 36° of latitude and then by 
the north shore of lake Keko Nor, and was accomplished 
between May and October. During nearly four months they 
were at an average elevation of 16,000 ft. The distance traversed 
between Leb, in Ladak, and Tankar on the Chinese frontier was 
nearly 2000 miles, and it took nearly five months and a half. 
The meteorological data are for the months of May to October : 
May: Fourteen fine days; five snow or sleet. North winds 
prevailed till the middle of the month ; thenceforward west 
and south-west. Minimum night temperature 10° Fabr. 
June: Twenty-six fine days. Snow on four days. Winds 
variable throughout. Coldest night 7° Fahr.; warmest 33°. 
Muximum in sun 110°; in tent 78°. 
July: Twenty-one fine days. Suow, sleet, or rain on ten days. 
Prevailing wind north-west. Coldest night (10th) 6° Fahr. 
Warmest night 1° of frost. Average night minimum 
21° Fahr. 
August: Eleven fine days and eighteen on which rain or snow 
fell. Winds variable. Several severe storms. Coldest 
night 18° Fahr.; warmest 40°; average night 34°. 
September: ‘l'wenty fine days and ten cloudy with snow oF 
rain, Prevailing wind west. Coldest night 7° Fabr.; 
