Manganese, determination of, 48.
Materials, bacteriological, 93.
Meat extract, 93.
Media, culture (see “Culture media”), 94–7, 107.
Methyl orange indicator, 37.
Methyl red media, 107.
test, 107.
Microscopical bibliography, 91.
examination, 89.
Mineral analysis, 56.
Moisture in sludge and mud, 74.
Mud deposits, analysis, 73.