222 INFECTIOUS AND PARASITIC DISEASES. 



from the tablets when a small quantity is desired, or in 

 larger quantity by taking 



Bichloride grs. 6iJ. 



Citric acid or common salt grs. 6iJ. 



Water gallon i. 



The i-iooo solution is ample for the destruction of all 

 non-spore-bearing bacteria at ordinary temperatures 

 in one-half hour. For spores, stronger solutions (1-500) , 

 and a longer exposure (one hour), are advisable. As a 

 disinfectant for the hands in surgical work, and as a 

 moist dressing in various inflammatory conditions, this 

 solution of mercury is in constant use. 



Formalin is used as a disinfectant in a 4 to 

 Formalin. 5 per cent solution of the 40 per cent solu- 

 tion of the gas in water. Its advantages as 

 a disinfectant are many; it does not injure most fabrics; 

 it attacks only two metals, iron and steel, and these 

 only when hot. It is non-poisonous, and albuminous 

 matter does not interfere with its action. It kills spores. 

 It is a true and efficient deodorant. Urine, feces, 

 sputum, and all albuminous discharges, are quickly 

 disinfected and deodorized by it. 



Carbolic acid is a useful disinfectant and 



Carbolic is with reason widely used. A 3 to 5 per 



Acid (phenol), cent solution (the latter 1-20) is the 



strength employed. Since it does not 



kill spores, it should not be used after anthrax, tetanus, 



