BULLETIN No. 90a. 
25 
With reference to the resins and fatty substances, there seems to 
be a slight difference in favor of the stalk-cure. A noticeable feature 
in this connection is the large percentage of resins and fatty sub¬ 
stances in sample A, representing the scrap from the stalk. This 
scrap consists of the extensions or wings of the leaf, which are attached 
to the stalks at the base of the leaf. It will also be seen that this 
sample is rich in nicotine and albuminoids. This sample cannot 
be considered in the comparison, as it was not saved by the wire¬ 
curing process. 
The analysis of the different grades shows that a considerable 
variation is found in the leaves from different parts of the plant. 
Some of the variations found by comparing the two processes of 
curing can be accounted for from the fact that like grades by the 
different processes do not consist of leaves from the same portions 
of the plant. 
The analyses of samples “X” and “W,” with reference to the 
merits of curing the stalk with the leaf, and curing the leaf separate 
from the stalk, but having all the other conditions as nearly alike 
as possible, shows no material difference in the results. The more 
complete organic analyses of samples L and M (first grade wrap¬ 
pers) found in table VIII, including leaf, stem and stalk, are of 
interest as such, but with reference to this experiment there is noth¬ 
ing to change the observations already noted. One of the most 
remarkable features of this variety of tobacco is the large percentage 
of carbohydrates, especially that of glucose, which in this case 
reaches 17.54 per cent, of the whole leaf. This glucose in the stem 
by the leaf-curing process is considerably higher than by the stalk- 
process, while the reverse is true in case of the stalk. While it is 
true that glucose is the most liable to change.of all the constituents 
of tobacco in the process of curing, it is believ^l that the differences 
are due in this case to the time and methods of harvesting. 
