was 2°02 inches, the heaviest rain occurring on the 15th, when 0°94 
inch fell. On the 2nd o.91 of an inch was recorded. Though rain fell 
on two other days the amount was recorded on these two only. 
No wind or cloud notes were made. 
From the morning of September 28th till the evening of October 4th, the 
expedition was travelling in a general westerly direction, first up the valley of 
one affluent of the Fén Ho, and then up that of another, till the Chiao-ch’éng 
Shan district was reached, where camp was pitched in a ravine at the base of 
a high mountain named Yiin-t’ing Shan. During these seven days all 
observations were kept up, including notes on the clouds and wind. The 
caravan mounted slowly from an altitude of 2600 ft. to one of 6950 ft., which 
rise, as might be expected, was accompanied by a steady decrease in the 
temperature of the atmosphere. Cirro-cumulus, cumulus, and cirrus clouds 
were noticed on the 2nd and 3rd of October, strong wind from the east on the 
last day of September and light wind from the west on two other occasions. 
For the rest, the sky was clear and the weather fine. 
October, 1908. Yiin-ting Shan. Altitude 6950 ft. 
The expedition remained at this spot, close to the great divide between 
the basin of the Fén Ho and the Yellow River, for twelve days, so that good 
sets of observations were secured. The average maximum temperature during 
this time was 57°2° F., whilst the average minimum was 32°7° F. The 
maximum and minimum readings taken at Yiin-t’ing Shan were 61'0° F. and 
ATO De 
The barometer ranged between 23°66 inches the highest reading, and 
23°45 inches the lowest, while it averaged 23°57 inches. 
Rain was recorded on the 4th, 5th and 13th, though the amount was not 
noted ; while a heavy fall of snow occurred on the nights of the r1th-1rath. 
Cirrus, cirro-cumulus or cumulus clouds were noted almost every day, and 
‘mists occurred twice, each time following rain. There was little or no wind 
felt in the ravine where camp was pitched, though a very cold wind blew over 
the pass, about a mile east of the camp on the day of arrival. Wind from the 
west was also noted on the summits of Yiin-t’ing Shan and Mo-érh Shan the 
highest peaks in the district, both of which were thickly covered with snow on 
the 13th. An ascent was made to the summit of Mo-érh Shan (Alt. 9200 ft.) 
on the r2th, and observations for temperature and pressure taken. The two 
aneroid barometers showed an average reading of 21°58 inches, the hypsometer 
195'5° F. and the thermometer 39°2 between 3.00 and 4.00 p.m. 
141 
