296 The Carhohjfdratea of the Maiiyold Leaf 



Bottoms of stalks contained 17'29 per cent, total sugars, 



58-3 per cent, matter soluble in alcohol ; 



when the Leaf contained 5-26 per cent, total sugars, 



40-6 per cent, matter solulilc in alcohol. 



3\§ 



Fia. 7. Mangold stalks, tojis, .Sri-ics I. Aui;. 2(i-27, 1913. 



2. As the season advances, a great increase occurs in the proportion 

 of sugars in the stalks at corresponding times of day. Thus, for example, 

 we have: 



At 12 noon, August 2Cth. Total sugars = 15-8 per cent.; matter 

 soluble in alcohol = 56-6 per cent, (average of tops and bottoms). 



At 10 a.m., September 10th. Total sugars = 25-3 per cent. ; matter 

 soluble in alcohol = 65-4 per cent. 



At II a.m., October lltii. Total sugars = 30-99 per cent.; matter 

 soluble in alcohol =^ ()3-0 per cent. 



In this comparison, in the last two cases samples were not taken at 

 noon, but had they been, the differences would be even greater. 



