131.

LACTIC acid, 14, 49.
bacteria, 15.

fermentation, 14.

Lamb on antivenine, 140.

Laveran on malaria, 110.

Lavoisier on fermentation, 9.

Leeuwenhoeck, 3.

Leprosy, bacillus of, 89.
Leucocytes, 33, 123, 139.
Liebig on fermentation, 9.

Light, influence on bacteria, 30.

Liver abscess, amœbæ in, 122.
Lustig's serum, 106.

Macfadyen on yeasts, 10.

Madura disease, 92.

Malaria, 110.

blood in, 114.

developmental cycle, 112.
mosquito phase, 112.

parasite, microscopic examination
of, 135, 136.

varieties of, 114, 135.

relation to Kala-Azár, 119.

Malignant fever, parasite of, 116.

pustule, 72.

Mallein, 99.

Manson, 110.

Meat, preservation of, 53.

tuberculous, 86.

Media, nutrient, 26, 129.
inoculation of, 130.

Mercuric chloride, 47.
Mercury, cyanide of, 48.
Metabiosis, 30.

Metatrophic bacteria, 25.
Methylene blue, 133.
Metschnikoff on cholera, 77.
on immunity, 123.

on B. tuberculosis, 84.
Micrococcus Ghadialli, 31.
ureæ, 10.
Microgametes, 112.

Micro-organisms. See Bacteria.
Microscopic examination of bacteria,
131.

Milk, bacteriology of, 14, 51.
boiling of, 52.

pasteurisation of, 52.
sterilisation of, 52.
tuberculous, 86.

Mixed infection, 108.

Mosquitoes, 110, 113.

extermination of, 118.

Mycoderma aceti, 13.

Nägeli, 27.

Needham, 3.

Neisser's gonococcus, 66.
Nitragin, 44.

Nitrates, 38.

Nitrification, 38.

Nitrifying bacteria, 6, 38.
Nitrobacteria, 38.
Nitrogen cycle, 37.

fixing bacteria, 42.
reclaiming, 40.
Nitroso bacteria, 38.

OMNE vivum e vivo, 6.
Oriental sore, 65.

PARASITES, definition of, 24.
malarial, 114.

Paratrophic bacteria, 25.

Pasteur on fermentation, 9, 11, 57.
protective vaccine, 72.

on spontaneous generation, 5.