Many scientific and engineering journals publish from time to time short articles or notices on filtration which are not included in the above list. Among such journals none gives more attention to filtration than the Journal für Gasbeleuchtung und Wasserversorgung, which publishes regularly reports upon the operation of many German filters, and gives short notices of new construction. The first articles upon filtration in this journal were a series of descriptions of German water-works in 1870-73, including descriptions of filters at Altona, Brunswick, Lübeck, etc. Stenographic reports of many scientific meetings have been published, particularly since 1890, and since 1892 there has been much discussion in regard to the “Rules for Filtration” given in Appendix I.
A Report of a Royal Commission to inquire into the water-supply of the metropolis, with minutes of evidence, appendices, and maps (London, 1893-4), contains much valuable material in regard to filtration.
The monthly reports of the water examiner, and other papers published by the Local Government Board, London, are often of interest.
The German “Verein von Gas- u. Wasserfachmänner” prints without publishing a most useful annual summary of German water-works statistics for distribution to members. Many of the statistics given in this volume are from this source.
Description of the filters at Worms was given in the Deutsche Bauzeitung, 1892, p. 508; of the filters at Liverpool in Engineering, 1889, p. 152, and 1892, p. 739. The latter journal also has given a number of descriptions of filters built in various parts of the world by English engineers, but, excepting the articles mentioned in the above list, the descriptions are not given in detail.
MORE RECENT ARTICLES.
The following are a few of the more important articles which have appeared since the first edition of this book. In addition many articles of current interest have appeared in the technical journals, particularly in the journals mentioned above.
Clark. Reports of Mass. State Board of Health, 1894 to 1897, inclusive.
Articles on the filtration of water, giving accounts of experiments at the Lawrence Experiment Station, and records of the operation of the Lawrence city filter. These experiments are directed principally to the removal of bacteria from sewage-polluted waters.
—— Jour. New England Water Works Assoc., XI., p. 277.