For some time bacteriologists interested in water or sewage analysis have realized the fact that for determining the number of bacteria per c.c. the water should be plated as soon as possible after it has been collected. If the samples are collected at some distance from the laboratory, recourse is had to packing in ice, which is always cumbersome and sometimes very inconvenient. Even then results will not be so accurate as those obtained by plating immediately after collecting. Various attempts have been made to plate dishes in the field, I believe without very satisfactory results, until last summer when I first used the apparatus here described.
Proceedings of the Iowa Academy of Science
©1904 Iowa Academy of Science, Inc.
Ross, L. S.
"Apparatus for Plating out Petri Dishes in the Field,"
Proceedings of the Iowa Academy of Science, 12(1), 7-8.
Available at: https://scholarworks.uni.edu/pias/vol12/iss1/7