338 
METHODS IN PLANT HISTOLOGY 
Fehling’s Solution.— 
. f Cupric sulphate. 3 g. 
\ Water. 100 c.c. 
-n f Sodium potassium tartrate (Rochelle salts).. 16 g. 
\ Water. 100 c.c. 
p j Caustic soda. 12 g. 
\ Water. 100 c.c. 
Keep it in three bottles labeled A, B, and C. When needed for 
use, add 10 c.c. of water to 5 c.c. from each of the three bottles. 
Millon’s Reagent.— 
Mercury. 1 c.c. 
Concentrated nitric acid. 9 c.c. 
Water. 10 c.c. 
Cuprammonia.— 
Prepare by pouring 15 per cent ammonia water upon copper turnings 
or filings. Let it stand in an open bottle. 
Phloroglucin.— 
Use a 5 per cent solution in water or alcohol. 
Celloidin.— 
To make a 2 per cent solution, add one tablet of Schering’s celloidin and 
enough ether-alcohol (equal parts absolute alcohol and ether) to make the 
whole weigh 2,000 g. 
Where only a small quantity is needed, shave off 2 g. of celloidin and add 
100 c.c. of ether alcohol. 
Eycleshymer’s Clearing Fluid.—• 
Mix equal parts of bergamot oil, cedar oil, and carbolic acid. 
Cellulose Acetate.— 
Cellulose acetate. 12 g. 
Pure acetone. 100 c.c. 
Mrs. Williamson recommends the cellulose acetate sold by Cellon, 
Ltd., 22 Cork Street, London, W. I., England. 
Glycerine Jelly.—• 
One part (by weight) of finest French gelatin is left for 2 hours in 6 parts 
(by weight) of distilled water. Add 7 parts of glycerin and for every 100 g. 
