10 



Winfer Whctd Varieties and Wintir-Killiiaj 



and witli the oftiiial liydrochloric acid nipthod jjavo results varyiug by 

 less tJian U-5 per cent, of tlie ((uantitv found. It appears, therefore, that 

 sucrose was the only disaccharide present in the leaves. 



Starch. A qualitative test for starch, with the usual iodine-potassium 

 iodide solution, was made on the dried, ground residue from the alcohol 

 extraction. 



Tabic 1. ChuMjt's in aminu nilroyen, lolul soluble nUrvgen and stujars of 

 winter wheal leaves during 5 datfs' storage in ice chest. 



Aniinii niliuyrii 

 VVaUii -solii bio iiitioHcii 

 Keduciiig .siigui' as clextiosu 

 Invert sugar as suci'o.sc ... 

 Total sugar as dextrose . . . 



Table 11. Physical constants of sap of ivinter wheat leaves. 

 Collcctod October 29, 1920*. 



* A delirniined ilirectly in tissue by tlu-rnioelectric method; i>H. determined on sap 

 expressed after grinding tissue without pievioiis freezing. 



Tabic ill. J'hi/sical constants (f sap of irintcr irlieat leaves. 



Variety A 1' 



Collection of November 12 

 Turkey ... 2-26 27-15 



Kanred 

 Aliiihardi («) 

 Minhardi (h) 

 ButTum 



2-.15 

 2-5(i 

 2-44 

 2-08 



28-23 

 30-74 

 29-30 

 32-17 



A' ■: lU^ 

 1920*. 



iisi; 



14-31 

 13-25 

 14-87 

 14-83 



Collection of December 9, 1920t. 

 Turkey ... 1-99 23-92 14-94 



Kanred 

 Minhai-di (u) 

 Minhardi \b) 

 Buffuni 



1-42 

 1-83 

 1-69 

 1-60 



17-08 

 22-00 

 20-32 

 19-24 



14-04 

 13-93 

 15-02 

 13-35 



/,H 



.")S4U 

 li-201 

 6-078 

 6086 

 5-980 



5-486 

 5-557 

 5,548 

 5-733 

 5.593 



* iSap e.\i)i'essed under ])ressure of 400 atmospheres after freezing tissues. 



-f- Sap expressed by large hand screw press afttir boiling tissues in pressure Uusks. 



