CORROSIVE SUBLIMATE. 311 



tion and foetid odours, thus arresting fermentation. Examples are : 

 Creosote, carbolic acid, peroxide of hydrogen, bichloride of 

 mercury, etc. 



Disinfectants. — Agents capable of depriving foul odours, etc. 

 of their germs by chemical affinity. Examples : Chlorine, char- 

 coal, HCl, carbolic acid, etc. 



Deodorisers. — Agents which act chemically, capable of destroy- 

 ing infectious and foetid odours, but forming new compounds with 

 the products of decomposition. Examples :~Eucalyptus, iodol. 

 carbolic acid, etc. 



Detergents. — Those agents which cleanse wounds, ulcers, etc., 

 and act as stimulants and emollients. Examples : — Borax, burnt 

 alum, tragacanth, etc. 



Germicides. — Agents which destroy any form of microbe or 

 disease germ and prevent the formation of microbes. Examples : 

 Cassia oil, permanganate of potash, HgCl2, H2O2, etc. 



Antizyniotics are agents which prevent putrefaction and are 

 divided into disinfectants and antiseptics. 



Disinfectants are divided into Deodorants, Detergents, and 

 Germicides. 



The use of the agent depends on how it is used with the 

 disease, and should be classified in that way. Say, in treating 

 some disease, we wish to arrest the same and to destroy the con- 

 ditions existing in the wound, we use the drugs above in the 

 following order : — 



Deodoriser. — To cleanse and purify. 



Germicide. — To kill microbes if present. 



Detergent. — To cleanse by acting as a stimulant and increase 

 vigour of the tissue. 



Disinfectant. — Keeps away the odours of the germs. 



Antiseptic. — Prevents the decomposition of the organic con- 

 stituents and destroys infection, arrests fermentation, etc." 



It is a suggestive fact that hooked fruits occur on low plants, 

 never on trees ; also that geologic time hooks appeared simul- 

 taneously with land animals. 



