[57] Nikolaiewa, _Annals of the Botan. Lab. of the Med. Inst. for Women_, No. 10. St. Petersburg, 1907. [58] Kuntze, _Centralbl. Bakt. Par._, 1909, 24, p. 101. [59] See Chap. II. [60] Rubinsky, _Centralbl. Bakt. Par. II._, 1910, vol. xxviii., p. 161. [61] Biel, _Jahresb. ü. d. Fortschr. d. Tierchem_, 1886, 16, p. 159. [62] Allik, _Dissertat. Dorpat._, 1896, 19, p. 303. [63] Fleischmann, _Lehrb. d. Milchwirtschaft_, 2d edition. Bremen, 1898. [64] Rist and Khoury, _Annal. Pasteur_, 1902, 16, p. 65. [65] Guerbet, _Comptes Rendus_, 1906. [66] Weigmann, _Lafar's Handb. d. Techn. Mykol._, 2d edit., 1905, vol. ii., p. 134. [67] Emmerling, _Cent. Bakt. Par._ 1898, vol. iv., p. 418. [68] Lindner, _Mikroscop. Betriebscontrolle, i. d. Gärungsgew_, 3d edit., Berlin, 1901. [69] Kalantharianz, _Dissert. Berlin_, Abs. in _Koch's Jahresb._, 1898, Bd. 9. [70] Luerssen and Kühn, _Centralbl. Bakt._ [71] Piorkowski, _Sitzungsber. der Berl. med. Ges._, Nov., 1907. [72] Metchnikoff, _The Prolongation of Life._ [73] Grigoroff, _Revue Médicale de la Suisse Romande_, 1905, p. 10. [74] Grixoni, _Abstr. Cent. Bakt. Par._ 11, 15, p. 750. [75] Freudenreich and Jensen, _Cent. Bakt. Par._ 11, 1897, 3, 545. [76] Moro, _Wien. klin. Wochenschr._, 5, 1900. [77] Makrinoff, _Cent. Bakt. Par._ 11, 1910, vol. xxvi., p. 374. [78] White and Avery, _Cent. Bakt. Par._ II, 1909, vol. xxv., p. 161. [79] Hastings and Hammer, _Research Bull., Wisconsin Experimental Station_, 6, 1909. [80] Boutroux, _Comp. Rend._, 86, 1905, 605. [81] Richet, _Comp. Rend._, 86, 1905, 550. [82] Koning, _Milchw. Zentralbl._, 1905, 1, 280. [83] Heinemann, _Centralbl. Bakt. Par._ 1908, 21, 57. [84] Chap. I. [85] Metchnikoff, _The Prolongation of Life_, 1908, p. 161. INDEX A Acerbi, 8 Acidity of milk, 64 Adametz on keffir, 92 Albumen, 52 Alcoholic fermentation, 17, 84 Allen & Hanbury's apparatus, 132 American incubating apparatus, 149 Analysis of milk, 48, 61 Aneyza Bedouins, 2 Arabs, 2 Arakà, 106 Ash of milk, 56 B _Bacillus acidi lactici_, 107, 112 _Bacillus acidophilus_, 110, 112 _Bacillus bulgaricus_, 39, 46, 82, 108, 110, 123, 154 _Bacillus casei_, 113 _Bacillus caucasicus_, 92, 94, 95, 119 _Bacillus caucasina_, 39 _Bacillus coli_, 45 _Bacillus esterificans_, 96 _Bacillus keffir_, 96, 97 _Bacillus lebenis_, 105 _Bacillus matzoon_, 109, 110 Bacillus of long life, 46 _Bacillus putrificus_, 122 _Bacillus subtilis_, 90, 92, 107 Bacteria in milk, 76 Bacteriology of fermented milks, 84 _Bacterium acidi lactici_, 92, 96 _Bacterium aërogenes_, 92, 96 _Bacterium coli commune_, 119, 122 _Bacterium sardous_, 110, 111 Balkan Peninsula, 4 Bedouins, 2 Beijerinck on keffir, 91 Biestings, 63 Biology of the keffir grain, 90 Blood, water contents of, 50 Bourgoul, 6