(7) Sulphur dioxide: exposure for 12 hours to an atmosphere containing at least 4 volumes per cent. of this gas, preferably in presence of moisture. This will require the combustion of 3-4 lb. sulphur for every 1000 cub. ft. of air space.
(8) Carbolic acid: 2 to 5 in 100 solution.
(9) Sulphate of copper: 2 to 5 in 100 solution.
(10) Chloride of zinc: 4 to 10 in 100 solution.
Following are recommendations with reference to the practical application of these agents:—
For Excreta.
(a) In the sickroom:
For spore containing material:
(1) Chloride of lime in solution, 4 in 100.
(2) Mercuric chloride in solution, 1 in 500; addition of an equal quantity of potassium permanganate as a deodorant, and to give colour to the solution, is to be recommended.