166 



J. Lindhard. 



due to Christmas, is very regular in the last 4 months, it varies 

 very greatly in the first 2 months. In another individual, Mr. Moule, 

 who has obviously found himself more at home with the apparatus, 

 the curve also has a different appearance; instead of''the pronounced 

 rise in May in the case of E. S. we find here just as marked a fall; 

 unfortunately these last experiments were not carried on throughout 

 the whole year. 



An experiment of longer duration, which is described in detail, 

 resembles a performance in modern sport. One of the participants, 



to give up the experiment for a time 



Professor F., was 



obliged 



owing to exhaustion; Smith says with regard to himself: "arteries 

 throb; hands swollen". And the third person experimented on was 

 no better. 



The results, that may be taken from such experiments, can in 

 no case refer to the normal respiration. 



With regard to the annual period it may further be remarked, 

 that the months are very unequally represented. For example, there 

 were 26 experiments in April, 4 in October. August, September and 

 October together embrace no more experiments than one of the 

 spring months. This may easily affect the results where the num- 

 bers are so variable. In August there are some few experiments 

 which all fall before the 10th; but at another place the author gives 

 two long, in his opinion more complete experiments, one for the 



