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porcelain enamelled iron tank, which was intended to contain
beer, marked “No 167,” and also in the powder which was
brushed off the surface of a similar tank marked “No. 3,”
which had been in use some little time, and beg to submit
our report as follows:—
Enamel from Tank No. 167.—
Lead as lead oxide (PbO)—24.90 per cent.
Powder from surface of Tank No. 3.—
Lead as lead oxide (PbO)—15.82 per cent.
We have also made a very careful determination of the
amount of lead extracted by the beer stored for varying periods
in one of the porcelain enamelled tanks at your Works, and
beg to report as follows:—
18 gallons of bright beer from the fsleworth Brewery,
marked “19 x 5d,” were run in a new porcelain enamelled
tank, the cover was screwed on, the samples were drawn
through the run-off cock at the bottom of the tank after
the beer had been well roused, (1) 24 hours, (2) 4 days,
(4) 10 days, after the beer had been run into the tank.
An examination of these samples gave the following
results:—
(2) Sample of Beer after 4 days in Tank.—
Lead as lead oxide (PbO)—0.15 grain per gallon,
(21.90 milligrams per litre.)
(3) Sample of Beer after 7 days in Tank.—
Lead as lead oxide (PbO)—0.18 grain per gallon,
(25.55 milligrams per litre )
(4) Sample of Beei after 10 days in Tank.—
Lead as lead oxide (PbO,)—0.28 grain per gallon,
(40.15 milligrams per litre.)
A sample of beer drawn from a tank used at the “Maltman
and Shovel” after it had been in the tank for three days was
also examined with the following results :—
Lead as lead oxide (PbO)—0.11 grain per gallon
(16.25 milligrams per litre).