MICROSCOPICAL BIBLIOGRAPHY.

a. Kean, A. L. A new method for the microscopical examination of water: Science, Vol. 13, p. 132, 1889; Eng. News, pp. 21, 276, 1889. b. Sedgwick, W. T. Recent progress in biological water analysis: J. N. E. Water Works Assoc., Vol. 4, pp. 50–64, 1889. c. ——. A report of the biological work of the Lawrence Experiment Station: Examinations by the State Board of Health of water supplies of Mass., 1887–90, pt. 2, Purification of sewage and water, pp. 793–862, 1890. d. Parker, G. H. Report upon the organisms, excepting the bacteria found in the waters of the State: Examinations by the State Board of Health of water supplies of Mass., 1887–90, pt. 1, Examination of water supplies, pp. 579–620, 1890. e. Rafter, G. W. The microscopical examination of potable water, D. Van Nostrand Co., New York, 1910. (Contains bibliography.)