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42 



Series IH. 

 New Algerian potaloes procured on May 21sl were allowed to remain in the 

 laboratory till May 23rd, when they were used for the experiments. During the 

 exposure the temp, was 12 — 14° during the day. 



Number I 



of . Weight 

 potatoes 



JVof 

 amides 



Decrease 



I of JV of 



amides 



fa. 

 >b. 

 (a. 

 >b. 



3^. 



4 b. 



5^ b. 



fijb. 



Directly crushed 



2 days without ether 



Directly crushed 



33 hours without ether. ... 



33 hours without ether 



33 hours with 02 c. c. ether per liter 



(= 2-8C.C.) 



Directly crushed 



33 hours with 04 c. c. ether per liter 



(= 5-6 c.c.) . 



Directly crushed 



20 hours with 0-1 c. c. ether per liter 

 (= 1-4 c.c). 44 hours without ether ! 



Directly crushed 



20 hours with 0-8 c. c. ether per liter 

 (=ll-2c.c.). 44 hours without ether 



grs. 

 110-67 

 109-80 

 111-50 

 109-39 

 110-58 



109-58 

 105-27 



105-37 

 99-12 



101-77 

 101-57 



101-27 



mgrs. 



8-80 

 8-20 

 9-68 

 9-40 

 7-75 



6-73 

 6-25 



6-25 

 7-75 



7-03 

 6-45 



6-05 



c.^qi / After the exposure: fresh 



unding-cork formed. 



13-73 



6-20 



The cut ; dark. 



Series I shows that injury alone produces a condensation of the amides (lb). 

 The results show averagely that small doses of elher produce an effect inverse to 

 the first mentioned: large doses of ether accelerate the regeneration of proteids pro- 

 duced by the injury. 



Series II shows on an average a condensation affected by the injury, which 

 was in most cases considerable; only in 4. and 7. a small increase of amides has 

 taken place. Comparing 2 with 7, 3 with 8 e. t. c. the results indicate that a 

 heightened temperature at first increases the condensation, while this process is 

 later on arrested. Yet the considerable irregularity of the deviations characteristic 

 of this series as well as of the former, indicates that the conclusions which might 

 be drawn by the results, are very uncertain. — Nor are the results of series III 

 better only indicating that injury produces a decrease of the amides. 



Though the conclusions arrived at by means of these results are insignificant, 

 the experiments have demonstrated that it is unsatisfactory to make but a few ex- 

 periments with such variable material, a circumstance which will further be 

 demonstrated by the following experiments. 



It was necessary to investigate by means of a sufficient number of experi- 

 ments the degree of the condensation produced in the potatoes by injury after a 

 limited lime of exposure, and further lo investigate whether the variability of the 



