326 
Inspection of dairy farms, 126 
Interstitial mastitis, 109 
Intestinal tuberculosis, diagnosis 
of, 95 
Involution, 2 
Lactalbumin, 16 
Lactation, physiology of, 1 
stages of, 3 
Lactoglobulin, 16 
Lactometer, Quevenne’s, 228 
Lactose, 18 
test for, 301 
Lactoscope test, 239 
Leach’s test, 259 
Legal standards, 23, 24, 25 
Leucocytes, estimation of num- 
ber, 281 
“ Letting down,” 7 
Litmus test, 254 
Malt-like taste and odor, 71 
Manure-like odor, 30 
Mann’s acidity test, 254 
Market milk, classes or grades 
of, 45 
composition of, 22 
frequency of tubercle ba- 
cilli in, 73 
prevention of contamination 
with tubercle bacilli, 90 
Mastitis, 104 
catarrhal, 105 
interstitial, 109 
milk, harmful properties of, 
110 
parenchymatous, 108 
tuberculous, 81, 93 
Medicines, excretion through 
udder, 119 
Metritis, septic, 115 
INDEX 
Milk, opacity of, 18 
biological properties, 36 
cellular content, 34 
chemical properties, 14 
color, 28 
defects, 66 
electrical conductivity, 34 
ferments or enzymes, 36 
freezing point, 33 
odor and taste of, 28 
pails, types of, 172 
physical properties, 28 
reaction, 26 
refraction, 32 
secretion, phases of, 6 
first phase, 6 
second phase, 7 
sickness, 104 
solids, 19 
specific gravity of, 30 
surface tension, 33 
Milk house, apparatus, 182 
construction, 181 
location, 180 
water supply, 193 
Milk vessels, methods of clean- 
ing, 183 
sterilization of, 190 
viscosity, 33 
Milking machines, methods of 
cleaning, 192 
Milking, methods of, 168 
Nauseating taste, 30 
Nitrates and nitrites, tests for, 
247 
Nutritive properties, effect of 
heat on, 211 
Odor, examination of, 227 
Odor and taste of milk, 28 
