London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Wembley 1940
[Report of the Medical Officer of Health for Wembley]
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samples taken between. 28th August and
31st December, 1940:-
284 in number.
Number which pass by accepted standard 150 i.e. 53%
Number which fail (l) plate count only 67 " 24%
(2) coli count only 21 " 7%
(3) both plate and coli 46 " 16%
(4) faecal coli 0 " 0%
Summary of agar counts.
(a) 3 days at 22° C.
Number 50-99 100-149 150-199 Others
under 50
230 33 9 4 1 @ 285
314
406
473
607
920
937
2430
(b) 2 days at 37° C.
Number 10-14 15-19 20-24 25-29 30-39 40-50 Others
under 10
201 29 20 11 8 3 5 1 @ 70
88
103
114
162
240
427
21.