Chlorine Gas is one of the oldest and most efficient of disinfectants, which has been displaced by changing fashion rather than from any failure to serve its purpose. In the convenient form of supersaturated lime-chloride, or, more strictly speaking, chlorinated lime, it may be sprinkled upon stable floors or placed in vessels about the building. Where the disinfection of unoccupied stables is the object to be attained, a more effective method is that of mixing common salt, binoxide of manganese, and sulphuric acid in a suitable vessel, closing the doors and windows, and allowing the chlorine gas evolved to permeate the whole structure. It has the disadvantage of irritating the air-passages of living animals, and damaging brass and other stable-fittings; reasons which, in a measure, account for so effective an agent having; fallen into desuetude.
Fig. 436. Eucalyptus globulus.
1, Section of unopened flower. 2, Anthers. 3, Section of fruit.