SOLUTIONS—USES AND PREPARATION OF. 
mercury and alcohol to remove oily substances 
from the skin prior to its use as a disinfectant is 
unnecessary. Strength of solutions from i- 
10,000 up to 1-300. 
Peroxide of Hydrogen (Hydrogen Dioxide), 
also called “dioxygen,” is considered by many 
surgeons to have no equal either for safety or 
efficiency in treating cavities or surfaces secret¬ 
ing pus. This preparation must be kept tightly 
corked, as it evaporates rapidly, and in a cool, 
dark place; heat and light spoil the preparation. 
Intestinal Evacuations may be safely disin¬ 
fected by pouring upon them three times their 
quantity of boiling water. Cover and allow to 
get cold before disposing of them. Milk of lime 
made from freshly slaked lime is also a safe, 
cheap disinfectant for-excreta. It should remain 
in contact with the evacuation for several hours. 
Freshly slaked lime must be used in preparing 
this solution. To slake the lime, pour one pint 
of water over two pounds of lime. When dis¬ 
solved mix thoroughly. This preparation is also 
called “hydrate of lime.” To make the “milk of 
lime ,> solution, use one pound of hydrate of lime 
to eight pints of water. Contact with the air 
spoils this solution, renders it inert, and for this 
reason it should be made anew every two days. 
.Lysol is a good antiseptic, especially so as it is 
non-irritant. It can be used to disinfect almost 
everything in the sick-room. 
It is used also for irrigation purposes; for dis¬ 
infection of skin prior to operations; for hand 
disinfection, etc. Usually a two per cent, solu¬ 
tion is required. When using the liquid lysol a 
two per cent, solution can be made by dissolving 
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