Peptone, authorized brands, 93.
Persulfate method (Mn), 48.
Petri dishes, 93.
Phenoldisulfonic acid method (nitrate), 23.
Phenolphthalein indicator, 36, 94.
Physical examination, 4.
Pipettes, bacteriological, 93.
Plating, bacteriological, 99.
Platinum-cobalt color standard, 9.
wire turbidity, 5.
Potassium, determination of, 59.
Presumptive tests, colon group, 102.