Abstract
WE are glad to welcome the third edition of this valuable book. Since the first edition was issued in 1880 an enormous amount of work has been devoted to the study of the microscopic organisms in water, and the increase in size of the present edition bears witness to this. The mystery of the comings and goings of various groups of algae and protozoa in our lakes and reservoirs still, however, remains unsolved. From the practical side much progress has been made in the artificial means of controlling Plankton growths and the purification of waters containing them. The Microscopy of Drinking Water. By Prof. G. C. Whipple. Third edition, rewritten and enlarged. Pp xxi + 409 + xix coloured plates. (New York: J. Wiley and Sons, Inc.; London: Chapman and Hall, Ltd., 1914.) Price 17s. net.
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