INDEX 
effect of COg pressure on, 
34 
effect of cutting vagus 
nerves on, 21, 25, 26 
effect of oxygen deficiency 
on, 42, 43 
effect of partial obstruc- 
tion on alveolar COs, 13 
essential factors in, 3 
extent of voluntary con- 
trol, 11 
frequency relation to alve- 
olar COg, 12 
-in diabetes, 35 
in regulation of alveolar 
COz, 7, 9, 11, 14 
influence of vagus nerve 
on, 21, 22, 23, 24, 26 
influence of vagus nerve in 
man on, 23, 24 
“mechanism” in regulation 
of, 16 
regulation of, 7, 9, 11, 14, 
26, 27, 38, 40, 42, 43, 46, 
47 
regulation of, in oxygen 
deficiency, 43 
vagus nerve in regulation 
of, 21, 22, 23, 24 
“vitalism” in regulation of, 
17 
Breuer, 21, 23 
“Buffer substances” in blood, 
36 
in urine, 40 
127 
Canaries, in detection of 
small percentages of car- 
bon monoxide, 46 
‘Capillaries, activity of walls 
after bleeding and trans- 
fusion, 80 
passive congestion in regu- 
lation of venous pres- 
sure, 74, 75 
Carbon dioxide, 3, 4 
absorption curve in blood, 
32, 33, 34 
absorption in blood, 41 
absorption in blood during 
violent exercise, 41 
effect on divers, 19, 20 
effects on circulation, 15 
in arterial blood, 27, 32 
in chemical combination in 
blood and plasma, 31 
in inspired air, effect of 
high percentage of, 9 
in regulation of gaseous 
contents of blood, 72 
“mass influence” of, 32 
regulation of circulation 
rate by, 76 
relation of barometric 
pressure to partial pres- 
sure of, 13 
removal in a vacuum, 32 
secretion by lungs, 67 
Carbon dioxide in alveoli, 
and frequency of breath- 
ing, 12 
at high altitudes, 47 
