﻿26.'i 



potatoes 



Nof 

 amides 



»b. 



»b. 



»b. 

 Ib. 



31-44 

 31 '39 

 47-28 

 47-81 

 3717 

 36-41 

 41-20 

 41-56 

 39-76 

 40-20 

 51-56 

 50-92 

 34-76 

 35-55 

 42-16 

 41-75 



mgrs. 



6-40 



6-00 



10-34 



10-18 



22-70 



18-40 



8-16 



7-50 



8-27 



8-30 



10-10 



9-54 



7-20 



6-97 



16-30 



17-20 



1-55 



18-94 



5-54 



Weight i 



of Number 



potatoes 



N of 

 amides 



jgfa 3708 



h) 37-57 



,^ / a 80-04 



l b 29-00 



,- »a : 57-81 



'' i b , 58-47 



16"« i 51-64 



\b I 51-04 



,./a ! 43-47 



\b .... 43-77 



,„(a , 48-56 



' U) I 48-40 



(a 44-99 



»b • 43-71 



.,,, ( a 50-24 



■ h) . 50-44 



■39 "l„. m = + 2-1Ü ")„. 



mgrs. 

 17-10 

 16-80 



8-52 



9-00 



10-40 



9-68 



11-90 



10-38 



9-20 



10-00 



15-70 



13-24 



8-28 



7-62 



9-86 



10-08 



Decrease 

 of N of 

 amides 



1-75 



-5-63 



12-77 



-8-70 



15-67 



7-97 



-=-2-23 



The results of this series show that a considerable condensation takes place 

 in potatoes even in the last stage of the resting period: 6-37 "/n ^ 2-10 "/u indicating 

 the degree of the condensation. 



Series / proves distinctly that a condensation of the nitrogenous compounds 

 has taken place during the experiment; it remains to be proved whether this 

 result indicates that injury solely may affect a correspondingly laige condensation 

 in old potatoes, or whether the ether has had a somewhat different etïect from 

 that of the other experiments; unfortunately I have got no measure for the corre- 

 sponding condensation affected by injury. The result of series K is somewhat in 

 accordance with the result of G, obtained in the autumn, though it might indicate 

 that a slight condensation has taken place in the wounded and etherized tubers. 



For all the experiments carried out in the spring only 1 half tuber was used 

 for each portion. Among the values of <t found in these series we find the smallest 

 one (in /) which has on the whole been demonstrated; yet we find in these series 

 also the lai-gest ones which have been demonstrated (in K and M). This circum- 

 stance proves that the above mentioned method used in arranging the experimental 

 portions does not occasion any errors. 



A resumé of the results of the experiments on the effect of injury and ether- 

 ization on potato-tubers may be summed up as follows: 



The processes in potatoes exposed to injury are characterized by a condensa- 



