Bulgarian maya, 10, 109 Bulgaricus group, cultural characteristics of, 115 Burckhardt, 6 Butin, 51 Butyric acid fermentation, 16 Butyrin, 51 C Camels' milk, 2 Caprinin, 51 Capronin, 51 Caprylin, 51 Carrick on koumiss, 18 Casein, 52, 53 Centenarians in Servia, Bulgaria, and Roumania, 41 Chatterjee on Dadhi, 38 Chemistry of milk, 47 Chocolate preparations and the soured-milk bacillus, 137 Citrates in milk, 57 Clay, Paget & Company's apparatus, 132 Coagulation of casein, 59 _Colitis_, 45 Colostrum, 63 Constituents of milk, 48 Continuous apparatus for producing soured milk, 81 Creamometer, 62 D Dadhi, 15, 38 Dairy Machinery & Construction Company's apparatus, 80, 82 Dairy Outfit Company's apparatus, 145 Dairy Supply Company's apparatus, 143; steriliser, 148 Dirt in milk, 63 Diseases of keffir grains, 97 _Dispora caucasia_, 34, 90 Dried sour milk, 5 Duclaux, 51 E Edgar's "Lactogenerator," 143 Eggs, yolk of, 52 _Enteritis_, 45 Enzymes in milk, 57 Equipment for town's dairy, 80 Essaulow on keffir, 89, 92 F Fat of milk, 50 Ferments at the altar, 3 Flügge, 35 Freshfield on keffir, 33 Freudenreich, 92 G Gaseous fermentation, 84 Gay-Lussac, 17 Gioddu, 107 Globulin, 54 Grieve, Dr. John, on koumiss, 19 H Hammerstein on keffir, 89 Handling of milk, 68 Health and disease, 151 Hearson & Company's "Lactobator," 141 Hebrews, 3 Houran, inhabitants of, 6 Hueppe, 16 Hutchinson, Dr. H. B., bacillus from English market milk, 120 Hutchison on koumiss, 30 I Ice chest, 136 Impure cultures, 158 Incubators, 141 India, 1 International Dairy Federation, 68 J Jebours, 3 K Kalmucks, 20 Keffir, 15, 32, 85; old, 88 Keffir grain, biology of, 90 Kephir, 34, 85. _See also_ Keffir. Keshk, 6 Keshk-leben, 6 Koumiss, 15, 18; Bogoyavlensky's method of preparation, 28, 98; analysis, 102; artificial, 102 Krannhals on keffir, 91 Kuntze, 95 L Lactic acid, bacillus, 16; cultures, 55; fermentation, 16, 84; Ferments apparatus, 131 "Lacto" apparatus, 145 "Lactobacilline," 158 _Lactobac. caucasicus_, 91 _Lactobacillus keffir_, 94 Lactometer, 64 Lapland, 8 Laurin, 51 Layard, 2 Leben, 15, 37, 104 Leben Raïb, 104 Lecithin, 52 "Le Ferment" apparatus, 128 Liebig, 17 Longevity, 155 M Mares' milk, 24 Matzoon, 15, 38, 106 Maya, 42; Bulgarian, 10 Maya Bulgare Company's apparatus, 131 Meeresy, 5 Metchnikoff, 34, 40, 44, 121, 158, 163 Micro-organisms, discovery of, 13 Middle Ages, 13 Milk-filling apparatus for bottles, 82 Milk, general properties of, 57; of different animals, 60; supply of the United Kingdom, 69; industry in the United States, 71; management, 74 Mitscherlich, 17 Myristin, 51 N