., No. 17, 1900. Harrison and
Cumming, Journ. Appld. Mic. 5: 2087. Russell and Hastings, 21 Rept. Wis.
Expt. Stat., 158, 1904.

[19] Fokker, Zeit. f. Hyg., 9: 41, 1890.

[20] Freudenreich, Ann. de Microg., 3: 118, 1891.

[21] Hunziker, Bull. 197, Cornell Expt. Stat., Dec. 1901.

[22] Freudenreich, Cent. f. Bakt., II Abt., 10: 417, 1903.

[23] This general statement is in the main correct, although Ford
(Journ. of Hyg., 1: 277, 1901) claims to have found organisms sparingly
present in healthy tissues.

[24] Backhaus, Milch Zeit., 26: 357, 1897.

[25] Freudenreich, Die Bakteriologie, p. 30.

[26] Stocking, Bull. 42, Storrs Expt. Stat., June 1906.

[27] Harrison, Cent. f. Bakt., II Abt., 5: 183, 1899.

[28] Drysdale, Trans. High. and Agr. Soc. Scotland. 5 Series, 10: 166,
1898.

[29] Schuppan, (Cent. f. Bakt., 13: 155, 1893) claims to have found a
reduction of 48 per cent. in the Copenhagen filters while in the more
extended work of Dunbar and Kister (Milch Zeit., pp. 753, 787, 1899) the
bacterial content was higher in the filtered milk in 17 cases out of 22.

[30] Backhaus and Cronheim, Journ. f. Landw., 45: 222, 1897.

[31] Eckles and Barnes, Bull. 159 Iowa Expt. Stat., Aug. 1901.

[32] Dunbar and Kister, Milch Zeit., p. 753, 1899. Harrison and Streit,
Trans. Can. Inst., 7: 488, 1902-3.

[33] Doane, Bull. 88 Md. Expt. Stat., May 1903.

[34] Eckles, Hoard's Dairyman, July 8, 1898.

[35] Fraser, Bull. 91, Ill. Expt. Stat.

[36] Fraser, Bull. 91, Ill. Expt. Stat., Dec. 1903.

[37] Stocking, Bull. 42, Storrs Expt. Stat., June, 1906.

[38] Backhaus. Ber. Landw. Inst. Univ. Koenigsberg 2: 12, 1897.

[39] De Schweinitz, Nat. Med. Rev., April, 1899.

[40] Conn, Proc. Soc. Amer. Bacteriologists, 1902.

[41] Freudenreich, Ann. de Microg., 2:115, 1890.

[42] Conn, Bull. 26, Storrs Expt. Stat.

[43] New York City is supplied with milk that is shipped 350 miles.

[44] Park, N. Y. Univ. Bull., 1: 85, 1901.

[45] Eckles, Bull. 59, Iowa Expt. Stat., Aug. 1901.

[46] Eckles, Bull. 59, Iowa Expt. Stat., Aug. 1901.

[47] Russell, 15 Rept. Wis. Expt. Stat. 1898, p. 104.

[48] Alvord, Circ. No. 9, U. S. Dept. Agric. (Div. of Bot.).

[49] Connell, Rept. of Commissioner of Agr., Canada, 1897, part XVI, p.
15.

[50] Harrison, Hoard's Dairyman, March 4, 1898.

CHAPTER IV.

FERMENTATIONS IN MILK AND THEIR TREATMENT.

Under the conditions in which milk is drawn, it is practically
impossible to se