2 
season from November to the middle of February. ot ite 
table gives the main meteorological features for the yea 
_ Meteorological Record taken at Chiengmat. 
April, 1909-March, 1910. 
1909. 1910. 
Oct. | Nov.) Dec.f Jan.| Feb. | Mar. 
Apr. 
May | June | July | Aug. | Sept. 
Mean Shade | 87°02| 86°39] 86°09} 83°12] 83-95 | 83°21] 83°67 | 76°25) 71°95} 74-21) 76°20) 78°81 
Mean Daily | 33:35) 24-67] 22°52] 20°40] 21°45 | 20°68] 22°32 | 20°31) 32°90)36°76) 36°48 | 32°55 
Range. 
HighestShade j108°8 {1075 j103°0 |104°5 |1040 |102°5 |102°0 | 93-0 | 93-0 196°0 |100°5 |103°5 
Lowest Shade| 67°0 | 69°0 | 72°0 | 69:0 | 76°0 | 70° | 70°0 [57-0 |60°5 [465 | 48°5 | 54°0 
Highest Sun 162 |} 152] 146] 140] 142] 143] 143] 188 | 128]129 | 141) 140 
Rainfall in 0°79| 4:69] 3°29] 1460} 9°94} 10°33 ya es 0 0°03| 3°91 
inches, 
Number of.| 10.) 199 | 161 98 | BoP So ae) ee | oc 
Mean Shade Temperature for the year .... 89°91° F, 
Total Rainfall for the year ... i .-- 57°628 inches. 
The Mean Shade Temperatures are calculated from the maxima 
and minima only. 
So far I have a meteorological record for one year only, which 
is, on the whole, a fairly average one with the exception of the 
rainfall, which was unusually large in the hot season of this year. 
Owing to the kindness of the Borneo Company, Ltd., Chiengmai, I 
am enabled to give the average monthly rainfall for : the nine years eee. 
1901-1909 :— 
_danuary-April ... oye ... 1:701 inches. 
ee 6°809 
“eee ee acre AOA. ws 
September - dey oo 39°19) fe 
October... siti ssi; FBOA: ae 
November... ck sas oss, Se oe 
December... 
Average yearly rainfall .., 51°285 ,, 
The temperature at higher altitudes on the mountains is very 
much cooler than at Chie engmai, and I think it probable that, at 
and near the top of Doi Sootep, frosts are not uncommon in the 
ould season. On the same range, but about 50 miles south of 
Chiengmai, at an altitude of about 3000 ft., I myself experienced a 
sharp frost one night in January. 
