was 2'02 inches, the heaviest rain occurring on the 15th, when 0*94 

 inch fell. On the 2nd 0.91 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 F6n Ho, and then up that of another, till the Chiao-ch'eng 

 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. 



Octoher, 1908. Yiin-t'ing Shan. Altitude 6950 ft. 



The expedition remained at this spot, close to the great divide between 

 the basin of the F6n 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 

 26-0° F. 



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 iith-i2th. 

 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-6rh 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-^rh Shan (Alt. 9200 ft.) 

 on the i2th, and observations for temperature and pressure taken. The two 

 aneroid barometers showed an average reading of 21*58 inches, the hypsometer 

 i95'5° F. and the thermometer 39*2 between 3.00 and 4.00 p.m. 



141 



