DISINFECTION _ Q17 
This amount is sufficient for the disinfection: of 1,000 
cubic feet of space. - 
"Care should be exercised in its use, as the gas evolved 
is slightly inflammable. After the operation, the person 
entering to open sealed windows and doors should wear 
a wet towel over the head, as the fumes are very deadly. 
Chlorine gas is a fairly effectual disinfectant, and sufficient 
for 1,000 cubic feet of space would be liberated by care- 
fully adding 6 ozs. of strong sulphuric acid to about 
2 lbs. of chlorinated lime. 
_ Spraying.—The dissemination into the air of a sick- 
room of antiseptics in a fine state of division cannot but 
have marked beneficial results, especially to patients 
suffering from respiratory complaints, and as applied to 
canine distemper wards it might very usefully be resorted 
to much more than it is. Special spraying machines 
may be purchased for the purpose, and some of the 
substances used with them are formalin, eucalyptus, 
Sanitas, euthymol, or almost any of the volatile oils. 
They not only deodorise and refresh, but largely sterilise 
the atmosphere of a sick-room. It is stated that 1 part 
of formalin in 10,000 of air will kill the cholera vibrio in 
one hour, the diphtheria bacillus in three hours, and the 
Staphylococcus pyogenes in six hours. Formalin being an 
irritant, the sprayer should wear gloves and’ goggles. 
A‘solution of } per cent. to 1 per-cent. is used. Per- 
chloride of mercury is one of the substances which have 
been used for disinfecting rooms by distribution from a 
spray-producer, of which the “ Equifex” may be taken as 
a type. With such a machine it is calculated that 
1 ounce of hydrarg. perchlor. used in solution of 1 in 
1,000 will disinfect 3,000 square feet of surface. 
Baking and Boiling.—Sterilisation by heat is a process 
seldom resorted to by those who devote their time and 
energy to the care of sick dogs, as so much of the 
apparatus pertaining to dogs—such as collars, leather 
leads and muzzles, clothing, dishes, etc.—is unsuitable 
