Contribution to the Physiology of Respiration under the Arctic Climate. 123 



sleepy and indisposed, however, there is nothing to support this 

 suspicion. The 12 experiments give an average of 10*65 ^^ 022, 

 /1 ■= 111 or 10-4*^/0 of the average, thus a considerable variability, 

 corresponding to the great fluctuations in the air-pressure. The 

 very great standard deviation is however due mainly to the high 



value in experiment No. 102, in which the deviation is over ^ , 



and falls outside the calculated upper limit, here 2038 /j.. Omitting 

 this, the average becomes 1036 + 012, /u = 059 or 5'7 ^'/o of the 

 average. In this case the deviations, which are still considerable, 

 are distributed somewhat evenly, with 6 in a positive and 5 in a 

 negative direction. 



The total volume of respired air is in this series greatly 

 reduced, but for the rest shows no special deviations. The average 

 is 472 ± 3-5, /л = 17-8 or 38 0/0 of the average. 



The average for the alveolar carbonic acid tension is 

 4*55 + 029, pi = 0149 or SS^Io of the average. In mercury pres- 

 sure the average is 318 4z 022, ju = 1*12 or 3-ä^lo of the average. 



This last series shows the following distribution: 



There seems here a certain connection between air-pressure and 

 the alveolar carbonic acid tension, low air-pressures giving low 

 values for the alveolar carbonic acid tension and conversely, or 

 xLiv. 10 



