124 PRACTICAL HISTOLOGY [XV 



ganglion in a solution containing 3 to 5 p.c. potassium bichro- 

 mate and '25 p.c. osmic acid for 2 to 3 days (if large up to 6 days). 

 Cut in two with a razor without squeezing, rinse in distilled 

 water, lightly press with blotting-paper to remove all excess of 

 fluid ; place in a mixture containing 2 to 3 p.c. silver nitrate and 

 25 to -5 p.c. osmic acid for 1 to 3 days. Cut free-hand or in 

 celloidin. 



