IQIO] 



WOO— A MA RAN Til US 



329 



Carbohydrates.— The carbohydrates were determined by the 

 reduction method with Fehling solutions. The cuprous oxide 



Fig. 8. — Different carbohydrates in leaves 



obtained was dissolved in excess of ferric ammonium sulphate 

 with H 2 S0 4 previously added. The ferrous ions produced by the 

 oxidation of cuprous oxide were titrated against a N/20 KMn0 4 



