On Steam and Brines 



167 

 Being the 



with the experiments arranged on the same plan, 

 last series, it is also the most symmetrical. 



The stations at higher levels are all in Switzerland, and 

 they are as follows in order of elevation : 



Of these places Pontresina, with St Moritz, was the most 

 important. The most complete series of observations on 

 mixtures, as well as on single salts, was made there. A 

 corresponding series of observations on single salts was made 

 on the Schafberg, which rises immediately behind Pontresina, 

 and about 900 metres above it. Shelter is obtained at the 

 top in the chalet which does duty as a restaurant, and it is 

 approached by a well-made path. Experiments on mixtures 

 of salts could not be made at this station, because the weather 

 became so persistently bad that the chalet was closed for 

 the season early in September. 



Of the other places on the list, St Moritz is taken as one 

 with Pontresina, because the difference of level is less than 

 that corresponding to ordinary fluctuations of the barometer. 



Zurich and Julier Hospiz were visited for the purpose of 

 verifying the thermometers by observing the temperatures of 

 saturated steam, and the barometric pressure by standard 

 barometers at the same time and place. One or two observa- 

 tions with salts were made at the same time, but they have 

 only the value of isolated observations. The boiling mixture 

 of chloride of sodium was observed at all the stations, and it 



