DOUGLAS AND BENEDICT METHODS. 163 



irregularity in respiration. Complained of pressure of the chest pneumograph 

 in first period of experiment (with spirometer unit), saying that it caused a 

 desire to breathe through the mouth. In second period (with Douglas appa- 

 ratus) he found it fatiguing to breathe; in fourth period (with same apparatus) 

 he moved his head and said that it ached slightly ; he found it difficult to breathe 

 toward end of period. Pressure in bag at end of period, 11 mm. of water. 

 In third period with spirometer unit (last period of experiment) , he was very 

 restless and tired, saying that he felt like getting up and jumping. Pulse-rate 

 uniform. Respiration fairly uniform, except in third period with spirometer 

 unit. Average barometric pressure and average temperature of air in appa- 

 ratus were: Spirometer unit, 761.6 mm. and 21.3 C., respectively; Douglas 

 apparatus, 761.3 mm. and 20.3 C., respectively. 



K. H. A., June '34, 1912. Spirometer unit, 3 periods; Douglas apparatus, 

 3 periods; preliminary period, 44 minutes; apparatus alternated. Subject 

 lying on couch; pneumatic nosepieces with both apparatus; rubber-flap valves 

 and small bag with Douglas apparatus. Subject stated that at the end of 

 first period with Douglas apparatus it was very much more difficult to breathe 

 than with spirometer unit. Pressure in bag at end of periods 7 to 8 mm. of 

 water. In second and third periods with Douglas apparatus he found it 

 easier to breathe. Pulse-rate in all periods except first and respiration in all 

 periods approximately uniform. Average barometric pressure and tempera- 

 ture of air in apparatus were: Spirometer unit, 763.5 mm. and 22.1 C., respec- 

 tively; Douglas apparatus, 763.4 mm. and 22.9 C., respectively. 



K. H. A., June 26, 1912. Spirometer unit, 3 periods; Douglas apparatus, 

 3 periods; preliminary period, 39 minutes; apparatus alternated. Subject 

 lying on couch ; pneumatic nosepieces with both apparatus, rubber-flap valves 

 and small bag with Douglas apparatus. Pressure in bag at end of experiment 

 approximately 8 to 9 mm. of water. Pulse-rate uniform in all periods, also 

 respiration-rate. Average barometric pressure and average temperature of air 

 in apparatus were: Spirometer unit, 757.0 mm. and 22.8 C., respectively; 

 Douglas apparatus, 756.8 mm. and 23.2 C., respectively. 



P. F. J., June 25, 1912. Spirometer unit, 3 periods; Douglas apparatus, 

 3 periods; preliminary period, 34 minutes; apparatus alternated. Subject 

 lying on couch; nosepieces with both apparatus, and rubber-flap valves and 

 small bag with Douglas apparatus. In first two periods with spirometer unit 

 subject complained of acid fumes. In first period with Douglas apparatus he 

 noted but little difference between the two apparatus. In second period with 

 this apparatus he thought there was some difficulty in breathing toward the 

 end. Pressure in bag about 8 mm. of water. Pulse-rate uniform in all 

 periods but first. Respiration-rate uniform. Average barometric pressure 

 and temperature of air in apparatus were: Spirometer unit, 763.1 mm. and 

 23.2 C., respectively; Douglas apparatus, 763.0 mm. and 23.3 C., respec- 

 tively. 



P. F. J., July 2, 1912. Spirometer unit, 3 periods; Douglas apparatus, 

 3 periods; preliminary period, 53 minutes; apparatus alternated. Subject 

 lying on couch; nosepieces with both apparatus; rubber-flap valves and small 

 bag with Douglas apparatus. In first period with Douglas apparatus subject 

 found it difficult to inhale but not to exhale, and said that he preferred the 

 spirometer unit, as breathing with latter was easier. Pulse-rate fairly uniform. 

 Respiration-rate in each period uniform; in second period with Douglas appa- 

 ratus, respiration-rate markedly faster, but with no apparent cause. Average 

 barometric pressure and average temperature of air in apparatus were: Spi- 

 rometer unit, 768.8 mm. and 21.0 C., respectively; Douglas apparatus, 

 768.7 mm. and 20.1 C., respectively. 



