306 Methods in Plant Histology 



Fehling's Solution.- 



J Cupric sulphate 3 g. 



A \ Water 100 c.c. 



f Sodium potassium tartrate (Rochelle salts) 16 g. 



1 \ Water 100 c.c. 



| 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. 



Venetian Turpentine.- 



To make a 10 per cent solution, add 90 c.c. of absolute alcohol to 10 c.c. 

 of thick Venetian turpentine. Stir it with a glass rod. Guess at the amount 

 of turpentine, for it is not easy to clean things which have contained Venetian 

 turpentine. 



The following need no formulae: Acetic acid, hydrochloric acid, 

 nitric acid, sulphuric acid, carbolic acid, chloroform, ether, xylol, 

 cedar oil, clove oil, bergamot oil, turpentine, glycerin, paraffin, 

 balsam . 



