﻿41 



253 



Number I 

 tubers 



Weight 



N of 

 amides 



I Decrease 

 of A' of 

 amides 



grs. 



mgrs. 



4^b. 



5' b. 



lil b. 

 (a. 



T 



5 days without ether 



2 days with 0-1 c.c. ether per liter 

 [= 14 c.c.)- 3 days without ether 



2 days without etlier 



2 days with 0-3 c.c. ether per liter 



(= 4-2 c.c 



2 daj's without ether 



2 days with (1-6 c.c. ether per liter 



(= 8-4 c.c.) 



4 days without ether 



4 days with 06 c. c. ether per liter 

 (= 8-4 c.c.) 



lGO-79 I 11-78 



]. 53-70 



11-85 

 12-70 



fresh ; wounding-cork 

 formed. 



The cut was black ; the outer 



layers of cells were dead ; 



the inner fresh. 



Series II. 

 Same material as in the former series. Tlie experiments were made Febr.— 

 March 1907 and were meant not only to illustrate how injury may act on potato- 

 tubers, but also how the temperature afïects the process. The first 4 samples of 

 plants remained in a constant temperature of 29 — 30° in a thermostat, the last 5 in 

 a cellar in a temperature of 10°; the plants were placed in closed bell-jars to pre- 

 vent their being exposed to toxic gases. 



Directly crushed . 

 3 days in 29—30° 

 Directly crushed . 



5 days in 29-30° 

 Directly crushed 



6 days in 29-30° 

 Directly crushed . 

 8 days in 29—30° 

 Directly crushed. 

 1 day in 10° ... 

 Directly crushed 



3 daj's in 10°. 

 Directly crushed 



5 days in 10° 

 Directly crushed 



6 days in 10°. . . 

 Directly crushed . 

 8 days in 10°. . . . 



9-14 



16-83 



-^2-13 



9-87 



1-73 



-r-2-05 



12-57 



0-25 



The potatoes were all fresh 



after the exposure and 

 wounding-cork was formed. 



I). K D.Vidensk. SeKU. Skr 



lidensk, of mulhcni. .\fil. VI. G. 



