London's Pulse: Medical Officer of Health reports 1848-1972

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London County Council 1904

[Report of the Medical Officer of Health for London County Council]

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T able II -Showing the results of the Bacteriological Examination of (11 the first "washings," and (2) the final "washings" of watercress obtained from various localities.

Mixture of 100 grammes by weight of cress+ 900 c.c. by measure of sterile water.

Number of Sample.B. Coli test. Number of B. Coli or coli-like microbes.
First "Washings."Final "Washings."
"Washings"of:-"Washings" of:-
10 grammes of cress.1 gramme of cress..1 gramme of cress..01 gramme of cress..001 gramme of cress..0001 gramme of cress..00001 gramme of cress..000001 gramme ot cress.10 grammes of cress.1 gramme of cress..1 gramme of cress..01 gramme of cress..001 gramme of cress.
100 C.C. of mixt.10 c.c. of mixt.1 c.c. of mixt..1 c.c. of mixt..01 c.c. of mixt..001 c.c. of mixt..0001 c.c. of mixt..00001 c.c. of mixt.100 c.c. of mixt.10 c.c. of mixt.1 c.c. of mixt..1 c.c. of mixt..01 c.c. of mixt.
* I.flaginac +flaginac +flaginact +-flinac +[+¶]-
* II.flaginac +flaginac +flaginac +flaginac +flaginac +flaginac +flinac +-flaginac +flaginac +flaginac +-
* III.[+11][+11]--
* IV.flin(ac) +flaginac +flagin(ac) +flaginac +flaginac +-flaginac +flaginac +-
* V.flaginac +fl(ac) + SLflag(ac) + SLfl(ag)in(ac) + SL-fl(ag)(ac) + SLflag(ac) + SLfl(ac) +-
§ VI.--
[1 VII.][ + ¶]flaginac +flaginac +inac +flaginac +-fl(ac) +flag(ac) +-
§ VIII.[ +¶]0 + LY--
* IX.flaginac +flaginac +flaginac +flaginac +-[+¶][+¶]-
* X.flaginac +flaginac +(fl)aginac +(fl)ag(ac) + LYflag(ac) + LYflag + LY-fl(ag) +fl +fl(ag) +(fl)aginac +-
* XI.flaginac +[+¶][+¶](fl)agac +-(fl)inac +-

* Topographical conditions unsatisfactory. † The significance of these letters is explained under "methods." § Topographical conditions satisfactory.
[+¶] signifies that acid and gas formation occurred in the primary medium, but that no coli-like microbes could be found in the secondary plate cultures.
║ The numbers correspond with those given in Table I. except as regards sample No. VII. (Table II.), which was from same source as No. III. (Table II.). Sample No. VII. (Table I.) was from
same source as sample No. VIII. (Table I.).