Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for London County Council]
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Table I.—Showing the results of the Bacteriological Examination of Tarious samples of water collected in connection with different watercress beds.
Number of Sample. | B. Coli test. Number of b. coli or coli-like II icrobes. | B. enteritidis sporogenes test. " Enteritidis change" in anaerobic spore-milk cultures. | Remarks. | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
100 c.c. | 10 c.c. | 1 C.C. | .1 c.c. | *.01 c.c. | .001 C.C. | .0001 C.C. | .00001 C.C. | 10 c.c. | 1 C.C. | .1 C.C. | .01 c.c. | .001 c.c. | ||
*I. | _ | ... | ... | ... | ... | ... | - | ... | ... | ... | ||||
* II. | - | ... | + | + | ... | |||||||||
[ + f] | — | - | ... | |||||||||||
IV. | ... | ... | - | |||||||||||
- | ... | ... | ... | - | ... | ... | ... | |||||||
... | ... | ... | ... | ... | ... | ... | ... | |||||||
- | ... | ... | ... | ... | ... | ... | ... | - | ... | ... | ... | ... | ||
- | ... | ... | ... | ... | - | ... | ... | ... | ||||||
* IX. | ... | ... | ... | ... | - | ... | ... | |||||||
* X. | — | ... | — | ... | ... | |||||||||
* XI. | - | - | ... | |||||||||||
- | ... | ... | ... | ... | ... | ... | - | ... | ... | ... | ... | |||
- | ... | ... | ... | ... | ... | ... | ... | - | ... | ... | ... | ... |
* Topographical conditions unsatisfactory. § Topographical conditions satisfactory. [ +¶] Signifies that acid and gas formation occurred in the primary medium, but that na coli-like
microbes could be found in the secondary plate cultures.
† The significance of these letters is explained under " methods."