TABLE XIV.—CONTROL OF DOSAGE BY STARCH-
IODIDE REACTION
| Starch-iodide Reaction After One Hour. | Bacteria on Agar Per c.cm. | B. Coli Per 100 c.cms. | |
| 1 Day at 37 C. | 2 Days at 20 C. | ||
| 000⊕⊕ | 40 | 15 | 0 |
| 0000⊕ | 37 | 18 | 8 |
| 00000 | 68 | 268 | 34 |
| 00000 | 115 | 553 | 61 |
| Raw water | 114 | 685 | 89 |
| The number of ⊕ signs indicates the intensity of the reaction. | |||
BIBLIOGRAPHY
[1] Nissen. Zeit. f. Hyg., 1890, 8, 62.
[2] Delépine, J. Soc. Chem. Ind., 1911, 29, 1350.
[3] Phelps. Water Supply Paper No. 220, U. S. Geo. Survey.
[4] Wesbrook, Whittaker, and Mohler, J. Amer. Public Health Assoc., 1911, 1, 123.
[5] Lederer and Bachmann. Eng. Rec., 1912, 65, 360.
[6] Harrington. J. Amer. Waterworks Assoc., 1914, 1, 438.