Heat, how kept up in the body, [14]
Hookworm disease, character of the worm, [120];
how it enters the body, [121];
how prevented, [122];
nature of the disease, [121];
where worm lives in the body, [121];
where prevalent, [122]
Insects that carry disease, [92–94]
Intestines, [171]
Iris, [177]
Joints, [163]
Lens, the, [178]
Ligaments, [165]
Lungs, [175]