STEARNS, F. P., and DROWN, T. M. Discussion of special topics relating to the quality of public water supplies: _Examinations by the State Board of Health of water supplies of Mass., 1887–90_, pt. 1, Examination of water supplies, pp. 740–9, 1890. Bibliography 93: STREET, J. P. Report on nitrogen: [In _Proc. Assoc. Off. Agri. Chemists_]; _U. S. Agri. Dept. Bur. Chem. Bull. 49_, pp. 12–25, 1897. Bibliography 94: SUTTON, FRANCIS. Volumetric analysis, 10th ed., pp. 72–4, P. Blakiston’s Son & Co., Philadelphia, 1911; Bibliography 94a: pp. 99–101; Bibliography 94b: pp. 239 and 477; Bibliography 94c: pp. 470–1; Bibliography 94d: pp. 479–83; Bibliography 94e: p. 473, 479–83; Bibliography 94f: pp. 484–8. Bibliography 95: TATLOCK, R. R., and THOMPSON, R. T. The analysis of waters and their changes in composition when employed in steam raising: _J. Soc. Chem. Ind._, Vol. 23, pp. 428–31, 1904. Bibliography 96: THOMAS, G. E., and HALL, C. A. New apparatus in water analysis: _J. Am. Chem. Soc._, Vol. 24, pp. 535–9, 1902. Bibliography 97: THOMSON, R. T. Use of litmus, methyl orange, phenacetolin, and phenolphthalein as indicators: _Chem. News_, Vol. 47, pp. 123–7, 1883. Bibliography 98: THOMSON, ANDREW. Colorimetric method for determining small quantities of iron: _J. Chem. Soc._, Vol. 47, pp. 493–7, 1885. Bibliography 99: THRESH, J. C. A new method of estimating the oxygen dissolved in water: _J. Chem. Soc._, Vol. 57, pp. 185–95, 1890. Bibliography 100: ——. The examination of water and water supplies, p. 200, Philadelphia, 1904; Bibliography 100a: p. 219; Bibliography 100b: p. 195; Bibliography 100c: p. 282. Bibliography 101: TIDY, C. M. The process for determining the organic purity of potable waters: _J. Chem. Soc._, Vol. 35, pp. 46–106, 1879. Bibliography 102: TIEMANN, FERDINAND, and GÄRTNER, AUGUST. Handbuch der Wässer, 4th ed., pp. 255–8, Friedrich Vieweg und Sohn, Braunschweig, 1895. Bibliography 103: TREADWELL, F. P. [translated by Hall, W. T.], Analytical Chemistry, 3d ed., Vol. 2, pp. 687–688, John Wiley & Sons, New York, 1911; Bibliography 103a: pp. 50–3. Bibliography 104: TROMMSDORFF, HUGO. Bestimmung der Organischen Substanzen: _Zeit. Anal. Chem._, Vol. 8, p. 344, 1869. Bibliography 105: U. S. GEOLOGICAL SURVEY. Measurement of color and turbidity of water, Form 9–182, Washington, 1902. Bibliography 106: WANKLYN, J. A. Verification of Wanklyn, Chapman, and Smith’s water analyses on a series of artificial waters: _J. Chem. Soc._, Vol. 20, pp. 591–5, 1867. Bibliography 107: ——. Water analysis, 10th ed., pp. 33–5, Kegan, Paul, Trench, Trübner, & Co., Ltd., London, 1896; Bibliography 107a: pp. 106–7. Bibliography 108: WARINGTON, ROBERT. Note on the appearance of nitrous acid during evaporation of water: _J. Chem. Soc._, Vol. 39, pp. 229–34, 1881. Bibliography 109: