PROF. C. A. KOFOID delivered, on December 27 last in Boston, an address as vice-president of Section F (Zoology) of the American Association for the Advancement of Science and as president of the ...
THE importance of Protozoa in determining the condition of the sludge has been reported by a number of workers and, more recently, the special significance of Vorticella has been emphasized by Pillai ...
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