SOLUTIONS USES AND PREPARATION OF. 



Use one ounce to a pint of water for "Normal" 

 strength. 



Formalin Solution. A four per cent 

 solution of formalin is considered to be as efifec- 

 tive as bichloride of mercury solution i-i,ooo, 

 or as carbolic acid solution 1-20 (5%). 

 Formalin contains formaldehyde forty per cent 

 and wood-alcohol ten per cent. Unlike bi- 

 chloride of mercury it does not unite with 

 albuminous substances in solution, but it Strong 

 destroys iron, steel or other metal quite as Points, 

 effectually. The four per cent solution is pre- 

 pared by adding forty-one-drams to each gallon 

 of water. It destroys spores and can be used 

 safely, also, to disinfect excreta, urine, pus, etc. ^ 



(For number of grains to use for each pint of 

 solution see table at close of Chapter VII. ) 



Boracic Acid is a mild, non-irritating anti- 

 septic used freely in irrigation and in surgery 

 of the eye and ear. Many surgeons use a sat- 

 urated solution ; others prefer a solution of one 

 dram to each pint of water. It is dissolved by 

 pouring boiling water over the acid powder. 



It does not dissolve readily in warm water. In Boil the 



-.IT 1 ■ 1 Solution, 



fact it would better be boiled. In makmg the 



saturated solution, it has been found that only 



about eighteen grains of the powder to each 



ounce of water is soluble in water alone. 



The American Standard. A solutic;rr-^ggj.^jj.jj 



known as the "American Standard" is made,j' 



135 ^ 



■Of 



