24 
RESEARCHES ON THE MANUFACTURE 
carefully collected from a part of a large tea plantation where 
the most uniform shooting was observed. The leaves were 
then thoroughly mixed together and treated as follows. 
1) 500 grs were immediately dried at 85X. 
2) 1500 ,, ,, made into green tea. 
3) 1500 ,, ,, manufactured into black tea. 
In these cases the manufacture was conducted with the 
utmost care, so that there'could be no loss of material, save 
that which is unavoidable ; viz., the adherence of the sap to the 
hands of the workman and apparatus. 
The following was found to be the percentage composition of 
the dry matter of these three specimens. 
Original 
leaves. 
Green 
tea. 
Black 
tea. 
Crude protein . 
37-33 
37-43 
38.90 
Crude fibre . 
10.44 
10.06 
10.07 
Ethereal extract . 
6.49 
5-52 
5.82 
Other nitrogen-free extract . 
27.86 
31-43 
35-39 
4-97 
Theine . 
3-304 
3.200 
Tannin 1 . 
10.64 
4.89 
Soluble in hot water . 
5°-97 
53-74 
47-23 
Total nitrogen . 
5-973 
5 - 9 8 9 
6.224 
Album. ,, . 
4.107 
3-937 
4.106 
Theine- ,, . 
0.956 
O.Q2Ö 
o -955 
Amido- ,, . 
O.9IO 
1.126 
1.163 
The following figures will show how much of each ingredi¬ 
ent of the dry original leaves remained in the teas after pre¬ 
paration. 
i Calculated as gallotannic acid as in all other cases. 
