128 



Chemical and Physical Notes 



the air temperatures observed at the Pfarrhaus in Pontresina three times 

 daily, and obligingly supplied to me by Herrn Pfarrer Falliopi. 



TABLE XXIII. Temperature of the Air at Pontresina. 



"In this table, the high temperature on the i8th, igth, 2oth and 2ist, 

 is very apparent. The F'ohn prevailed during all these days. 



"On the 23rd August, which was a very warm day, I made a series of 

 observations between Pontresina and the top of the Piz Languard, which 

 is the highest peak on the ridge immediately behind Pontresina, and is 

 very easily accessible. It had been raining heavily in the night, so that 

 in the early morning the air was rather cool; but the following observa- 

 tions, made before starting up the mountain, will show how rapidly the 

 temperature was beginning to rise : 



8.0 a.m., dry bulb, io'4; wet, 9'2. 

 9.10 ,, i4'8; ,, ii c> 4. 



"At 10 a.m. I started up the mountain, following the excellent path 

 which leads to the summit. 



"In Table XXIV the temperatures observed at various stations are 

 entered, along with corresponding ones observed in the porch of the 

 Hotel Reseg at Pontresina. 



"Excepting in the first interval the rate of fall of temperature between 

 Pontresina and the station on the mountain is less than i per hundred 

 metres. At the summit the mean temperature of the dry bulb was io75, 



