yi CONTENTS. 



PAGE. 



Discussion of results continued. 



Experiments with horizontal walking continued. 



Physiological effects of horizontal walking 160 



Respiration-rate during horizontal walking 160 



Pulmonary ventilation during horizontal walking 162 



Pulse-rate during horizontal walking 163 



Comparison of pulse-rate during standing with that during horizontal 



walking 165 



Relatioaship of oxygen consumption, pulse-rate, and pulmonary ven- 

 tilation during horizontal walking 169 



Body-temperature during horizontal walking 172 



Blood-pressure during horizontal walking 175 



Experiments with grade walking 177 



Physiology of mouth-breathing appliances 177 



Effect of mouthpiece breathing upon metabolism 178 



Effect of mouthpiece breathing upon respiration-rate, pulmonary ven- 

 tilation, and rate of oxygen consumption 182 



Effect with subject standing 184 



Effect during grade walking 184 



Conclusions with regard to the effect of long and short preliminary 



mouthpiece breathing 



Metabolism of subjects walking on an incline 193 



Carbon-dioxide elimination and oxygen consumption during grade 



walking 224 



Respiratory quotient during grade walking 230 



Total heat-output during grade walking 



Increment in heat-output due to grade-lift 



Total increment in heat due to grade-lift 238 



Increment in heat per kilogrammeter of work done in grade-lift . . 241 



Step-lift during grade walking 



Comparison of step-lift in horizontal and grade walking 246 



Work of ascent 248 



Efficiency in grade walking 



Efficiency in work due to grade-lift 



Efficiency in work of ascent 253 



Effect of lameness upon the efficiency of E. D. B 256 



Physiological effects of grade walking 257 



Respiration-rate during grade walking 257 



Pulmonary ventilation during grade walking 260 



Pulse-rate during grade walking 262 



Body-temperature during grade walking 268 



Blood-pressure during grade walking 276 



Physiological changes in transition from standing to grade walking and the 



reverse 277 



Respiratory changes in transition from standing to grade walking 278 



Changes in respiration-rate 279 



Changes in pulmonary ventilation 



Changes in rate of oxygen consumption (unreduced) 



Respiratory changes in transition from grade walking to standing .... 287 



Changes in respiration-rate 



Changes in pulmonary ventilation 



Changes in rate of oxygen consumption (unreduced) 295 



Conclusions regarding respiratory changes in transition from grade 



walking to standing and the reverse 



Pulse-rate in transition from standing to grade walking 297 



Pulse-rate in transition from grade walking to standing 



After-effects of grade walking 



Summary of results 309 



