DISSOCIATING FLUIDS. 89 



(iv.) CHROMIC ACID. 



Chromic Acid, 1 grm. ; Water, 1000 5000 cc. 

 For connective tissue, unstriated muscle, and nerve tissue. 

 Takes from 24 hours for nerve tissue, to 7 days for uterine 

 fibroid. 



(v.) NITRIC ACID. 



20 p. c. aqueous solution. 



Takes 24 hours to dissociate small pieces of muscular tissue ; 

 the muscle cells are then teased out, and may be mounted in 

 Glycerine. 



(vi.) NITRIC ACID AND GLYCERINE. 



Glycerine, 1 part ; Water, 3 parts ; Nitric Acid, 1 part. 

 In dissociating nervous structure takes from 3 to 4 days. 



(vii.) OSMIC ACID. 

 0-1 p. c. aqueous solution. 

 Used for cerebral cortex. Takes 24 to 48 hours. 



(viii.) METHYL MIXTURE (Schieffer decker's). 



Methylic Alcohol, 5 cc. ; Glycerine, 50 cc. ; Distilled Water, 

 100 cc. 



Used for retina and central nervous system and takes 

 several days. 



(ix.) CHLORIDE OF SODIUM. 



10 p. c. aqueous solution. 



Used for dissociating white fibrous tissue. 



Ix.) CAUSTIC POTASH. 



30 to 50 p. c. aqueous solution. 



It acts very rapidly. 



Used for separating muscle cells, as in cases of myomata. 



