of, 13;
relation to air, 13;
relation to chemicals, 16;
relation to drying, 15;
relation to light, 16;
relation to temperature, 12;
size of, 9;
saprophytic, 11;
spores of, 10;
types of acid-forming, 86;
undesirable acid-forming, 90.

Bedding, 47.

Bitter fermentation, 97.

Bleaching powder, 112.

Bloody milk, 99.

Butter, bacteria in, 154;
bacterial defects in, 156;
cowy odor in, 157;
deterioration of, 155;
fishy, 157;
metallic, 157;
molding of, 157;
preservatives in, 155;
putrid, 156;
source of flavor, 140;
turnip flavored, 156;
types of, 137.

Butter-milk, 100.

Butyric fermentation, 93.

Boric acid, 117.

Borax, 117.

C.

Carbolic acid, 111.

Cheese, abnormal fermentations of, 174;
bitter, 177;
Camembert, 186;
Cheddar, 164;
colored, 178;
flavor production in, 172;
gassy, 174;
Gorgonzola, 185;
Limburger, 187;
moldy, 179;
preservation of by acid, 171;
putrid, 178;
quality of milk for, 162;
ripening of, 169;
Roquefort, 184;
Stilton, 185;
Swiss, 180;
temperature of ripening, 173;
types of, 161.

Children, diseases of, 80.

Chloride of lime, 112.

Cholera, 80.

Cleaning utensils, 39.

Clean milk, production of, 53.

Cold, effect of, on bacteria, 14.

Colored milk, 98.

Condensed milk, 135.

Contagious abortion, 75.

Contamination of milk, from milking machine, 50;
in factory, 59.

Cooling of milk, 54.

Corrosive sublimate, 111.

Cream, control of fermentation of, 142;
pasteurization of, 146;
ripening of, 138;
separators, 36.

Cresol, 111.

Curd test, 104.

Cycle of fermentations, 99.

D.

Deodorants, 109.

Digestive fermentation, 93.

Diphtheria, 79.

Dirt, exclusion of, 44;
removal of from milk, 53.

Disinfectants, 16, 109.

Disinfection, 109.

Distribution of bacteria, 18.

Dried milk, 135.

Drugs, excretion of in milk, 58.

Drying, effect of on bacteria, 15.

E.

Emmenthaler cheese, 180.

Evaporated milk, 134.

F.

Factory by-products, 36;
treatment of, 38.

Feeds, effect of on milk, 57.

Fermentation test, 104.

Fermented milks, 100.

Fly, contamination of milk by, 60;
means of spreading typhoid fever, 78.

Foot and mouth disease, 74.

Fore milk, 31; rejection of, 34.

Formalin, 112.

G.

Galactase, 172.

Garget, 75.

Germicidal action of milk, 33.

Gorgonzola cheese, 185.

H.

Hairs, bacteria