124 



J. Lindhard. 



00 

 о 



05 



perhaps it would be better to say, 

 that falling air-pressure gives decrea- 

 sing carbonic acid tension, rising air- 

 pressure increasing tension. For the 

 barometer > 750 we get an average 

 of 32-4, for < 750, 31-4. The same 

 phenomenon appears, though less 

 distinctly, when we take the percen- 

 tage of carbonic acid. 



The amount ofcarbonic acid 

 expired is on an average 2085 ^i; 09, 

 ß = 49 or 23 ^-lo of the average. The 

 calculated limits of the series are 4: 

 2038 /2, and thus the experiment No. 

 98 gives too high a value, probably 

 due to the uncertainty in the air ana- 

 lyses. This experiment omitted the 

 average will be: 207-5 4: 07, /i = 36 

 = Г7 "/o of average. 



In addition to the experiments 

 discussed in the foregoing, I may also 

 mention here 3 morning experiments 

 from May 1908. At this period I 

 again made a double series of experi- 

 ments at different times of the day, 

 for comparison with the series from 

 November — December 1907. I thus 

 made morning experiments on 3 days, 

 and these are of interest in several 

 ways, partly because they fall in the 

 interval between two of the foregoing 

 series, partly because they were taken 

 during relatively low, outer tempera- 

 tures, which have a very marked effect 

 in all three cases, perhaps for the 

 reason that the experiments were not 

 made on 3 successive days. As the 

 separate values are almost identical 

 in the three experiments, I believe 

 that a certain importance may be at- 

 tached to them in spite of the small 

 number. 



