RESPIRATION RATE. 471 



January. With the values for Mon there is no noticeable persistent 

 change throughout the experiment. With Moy a slight fall of less 

 than 1 respiration per minute is noted at the end of the experiment. 

 One of the most pronounced changes in respiration rate is found with 

 Pea, who, in the early part of the experiment, shows rates approxi- 

 mately 17 per minute, but during January the rate fell to nearly 14. 

 With Pec values averaging somewhat above 14 are noted in early 

 October, and in January the rate is about 12 per minute. 



In spite of the fact that Spe was one of the best subjects that we 

 had for the respiration-apparatus experiments, showing very regular 

 breathing and almost invariably giving very concordant results, we 

 find the respiration rate is irregular. There is a tendency, however, 

 for the lowest values to appear during the months of November and 

 December. His respiration rate per minute was one of the slowest of 

 those recorded. 



With Tom the general average level is not far from 14 at the start 

 of the experiment, and settles down to about 13 in January. With 

 Vea, except between October 27 and November 15, when the respira- 

 tion rate was somewhat above 13, the rate remained most of the time 

 between 10.5 and 12. In the latter part of January the values average 

 very closely to the rate in the first few days of reduced diet. 



With Squad A, therefore, the general picture of the respiration rate 

 shows a slight tendency for the values to decrease somewhat from a 

 group average of not far from 14 in October to 12.5 in January. Care- 

 ful inspection of the data indicates no appreciable difference in the 

 respiration rate, whether the subject used the mouthpiece on the 

 portable respiration apparatus or the mask with the respiratory-valve 

 apparatus. Table 108 gives the respiration rates for the subjects in 

 the post-absorptive condition and in the lying position, but does not 

 include respiration rates found with the standing position just prior to 

 walking; these will be given in a subsequent table. 



It appears very clear from an examination of the averages in the 

 last colunrn of table 108 that no pronounced effect upon respiration 

 rate is to be observed as a result of the restricted diet. In the majority 

 of instances there is a slight decrease in the respiration rate. In one 

 or two cases there is a perceptible increase. Considering the fact 

 that all these respiration rates were obtained with artificial breathing 

 appliances, one may not state positively that there is a general 

 tendency for the reduced diet to alter the respiration rate by more 

 than one or two respirations per minute. 



CHARACTER OF THE RESPIRATION. 



It is somewhat unfortunate that graphic tracings of the exact respira- 

 tory ventilation could not have been obtained, such as are usually 

 secured with the universal respiration apparatus in this Laboratory. 

 Subsequent experience with the portable respiration apparatus has 



