246 Measures in the Bombay Presidency and Sind. [CHAP. VIII.
acid in the proportion of 2 in 1,000 has been added. On
the following day the rooms should, if possible, be washed
out with the dilute sulphuric acid.
(3) In the case of dwelling rooms in which there is no actual
evidence of infection, but which are being merely cleaned
out as a precautionary measure, the dilute sulphuric acid
need alone be used. The inhabitants should be advised
not to "lepo"* the floors after this has been done, with the
unfortunately necessary exception of the part of the floor
near the cooking place.
(4) Dilute sulphuric acid should be used in large quantities for
washing out passages, courtyards, and surface drains.
(5) In order to diminish the risk of coolies being burnt by having
to handle strong sulphuric acid, it should be diluted with
an equal bulk of water at the dispensary before being sent
out. To make a dilution containing one part in 250, three
ounces of strong sulphuric acid, or six ounces of the acid
mixed with its own bulk of water, should be added to
every "nand" of water: an ordinary "nand" holds nearly
four gallons. A rough indication as to whether or not
water has been added to sulphuric acid may be obtained
by adding pure sugar to some of the acid. If sulphuric
acid contains more than 40 per cent. of water, the mixture
will not turn black during the next hour. The sugar
employed should be slightly moist."
* Smear with cow-dung.