NOTES ON THE METABOLISM IN THE CHERRY TREE. 50I 



more correct estimation as to the changes can be obtained if we 

 take the fibre as a constant quantity, which may here safely be 

 done, and recalculate the numbers for proteids, fat, and carbo- 

 hydrate. We obtain now the following" results : — 



(A) 



Fibre 100.00 



Crude Proteid 27.31 



Fat ' 19-67 



Carbohydrate 77-9§ 



Hence the proteids decreased 37.16% 



Fat decreased 30.35,, 



Carbohydrate decreased 40.59 ,, 



This shows that the bark of the twigs plays a very important 

 part as a reservoir for the development of the buds in spring. 



(B) 

 I0O.OO 

 17.16 

 13.70 

 46.33 



A naly tical Data. 

 Determination of total nitrogen. 0 ' 



Baryta-water, cc. 

 6.70 

 5-30 



Dry matter, < 



Bark (A) 0.946 



„ (B) 0.890 



Leaf 0.883 



Flower 0.879 



Determination of albumoid nitrogen by Stutzer's 

 Dry matter, g. Baryta-water, cc. 



Bark (A) 0.946 



„ (B) 0.890 



Leaf 0.883 



Flower 0.879 



Determination of crude fat. 



Dry matter, e. ( rude fat. 



Bark (A) 4.728 0.3235 



(B) 4-449 0.2377 



Leaf 4-415 0.3970 



Flower 4-396 O.4415 



27.90 

 16.00 



5.40 

 4.20 

 22.70 

 1 1 90 



Percentage of 

 nitrogen. 

 I.52 



I.07 



5-59 



3- 22 



method. 



Percentage of 

 nitrogen. 

 1. 18 



O.84 



4- 55 

 2.40 



Percentage. 

 6.84 



5-34 

 8.99 

 10 04 



(1) All the nitrogen determinations were made by Kjeldahl's method. 

 10 cc. of sulphuric acid were put in the receiver. 



In the case of bark (A\ 1 cc. sulphuric acid =3. 16 baryta-water solution, and 1 cc. 

 baryta-water = 2.14806 mgr. nitrogen. 



In the case of bark (I?-, 1 cc sulphuric acid — 2.16 baryta-water solution, and 1 cc. 

 baryta-water = 1. 771 15 mgr. nitrogen. 



