INDEX 
Haemoglobin, 6, 28 
aggregation of molecules 
by inorganic salts, 31 
behaviour as a weak acid, 
32 
colorimetric estimation of, 
52 
combination of carbon 
monoxide with, 45 
function of, 7 
percentage, after excessive 
water drinking, 78 
at high altitudes, 51, 52, 
56, 57 
effect of increased oxy- 
gen pressure on, 52 
Hasselbalch, 36, 49, 51 
Heart, function of, 72 
nerve supply, 73 
regulation of 
rate by, 72, 73 
regulation of discharge, 74 
sympathetic control, 73 
vagus control, 73 
Hemorrhage, effect of (see 
bleeding) 
Henderson, L. J., 40 
Henderson, Yandell, 15, 25, 
46, 55, 74 
Henry, law of, 28 
Hering, 21, 23 
Hering-Breuer inhibition and 
alveolar COs, 25 
and artificial respiration, 25 
Himalayas, 58 
Hook, 6 
circulation 
131 
Hydrogen ion concentration, 
36 
and COg pressure in blood, 
37 
effect of diet on, 37 
effect on respiratory cen- 
ter, 37, 89, 111, 112 
under low atmospheric 
pressure, 51 
Hyperpnoea, 6 
effect on alveolar COe, 42 
Immunity to micro-organ- 
isms, 95 
to poisons, 95 
Inspiration, cause of, 22 
Intestines, formation of am- 
monia in, 39 
passage of salts into, after 
excessive water drinking, 
78, 79 
Kidneys, excretion of water, 
77 
in regulation of blood re- 
action, 39, 40, 51 
Kidney secretion, 64, 65 
effects of drugs on, 65 
effects of excessive water 
drinking on, 79 
effects of oxygen want on, 
65 
effects of sweating on, 79 
regulation of, 89 
Krogh, 53, 57, 67 
