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3. No brushing of walls or floor should on any account be permitted. This is a most dangerous proceeding and likely to spread infection.
4. The first work in all instances is to flood the floor of the infected room with a solution of Perchloride of Mercury not weaker than 1-1,000. The junction of floor and walls and all corners should then be mopped with the solution, as well as the walls as far as the mop will reach, and beyond this a small hand-pump should be used. The floor, if of earth, should then be dug up to a depth of 4 inches. (But this must on no account be done before the surface has been flooded with the solution.)
N. B.-The solution of Perchloride of Mercury, 1 to 1,000, may be prepared by adding 2 lbs. crude of Hydrochloric Acid to 100 gallons of water and then dissolving the mercury in it, with a handful of common salt to expedite dissolution.
5. All furniture that can be dealt with should be likewise disinfected with this solution either with a pump or a cloth.
6. After the work has been thoroughly done and the solution has dried, lime hot, and in as strong a solution as possible, should be laid on all the walls, the floor and ceiling.
7. Articles of value, likely to have been infected, should be classified according to their nature -
(1) Those which can be boiled, if of cotton, to be boiled for 3 hours in a 3 per cent. solution of soft soap with water, or steeped in Perchloride of Mercury solution after being washed (woollen clothes worn by a patient to be burned), and then exposed to the sun.
(2) Articles which from their size or value cannot be boiled should be disinfected with a 5 per cent. solution of Carbolic Acid, which should be allowed to dry upon them.
(3) Articles which can neither be boiled nor so disinfected, should be exposed to the sun.
8. In parts of buildings where insects are likely to be harboured, kerosine oil should be applied with a syringe, or boiling water poured over them.
9. In the event of the whole house requiring disinfection, the order of procedure should be-
(1) Privies with their shafts;
(2) Staircases and corridors;
(3) The rooms in order;
first by washing every part with the Perchloride of Mercury solution, and then laying on the hot quicklime.
10. All nahanis, nahani pipes, morees and traps should be carefully flooded with Perchloride, and where necessary, entirely replaced at the expense of the owner of the premises.
11. As a measure of precaution Carbolic Acid powder or dry Chloride of Lime may be sprinkled inside buildings adjoining the infected one.
12. In the use of Perchloride of Mercury, a virulent poison, its properties, when coming in contact with organic compounds, should be remembered.
13. A reward for dead rats may be given. They should be burned with straw and kerosine oil.
N. B.-The disinfectant action of Perchloride on clothes is increased by the subsequent soaking of them in Phenyle.