148 



Whilst the majority of Ihe members of the German expedition 

 Ihus showed decreasing frequency with increasing altitude, the con- 

 dition was different on one of Mosso's expeditions up Monte Rosa^ 

 Of the 7 persons investigated only 2 showed a diminished frequency, 

 in 4 it was increased: 



Frequency 



TT д/г Gressony 12 



и. Mosso Margherita hut 13 



В. Bizzozzero — ч г 



Camozzi 



Sarteur — ^q 



Solferino 

 Chamois 



10 



— 14 



Turin 18-5 



Margherita hut 155 



Oberhoffer — ^g 



The two last-mentioned came directly from Turin, the others 

 had been a week among the mountains before ascending Monte 

 Rosa. It will be remarked that whilst the last two have a respira- 

 tion-frequency of 185 and 20, all the others have considerably lower 

 values to start with, and on Monte Rosa the highest value among 

 the latter is scarcely as great as the lowest value in the two coming 

 from Turin. 



It will be shown below, that the frequency of respiration in 

 my experiments rises when the air-pressure declines and vice versa; 

 further, that my respiration-frequency is high in winter, low in 

 summer. Connecting this with the view I have already set forth, 

 that the changes undergone by the respiration in the high-arctic 

 summer, which precisely agree with the changes experienced in 

 high mountains, are due to the chemical rays of the sun, then the 



1 A. Mosso: Der Mensch auf d. Hochalpen. Leipzig 1899. 



