preparation made from the leaves of a shrub called Thea. The
difference between black and green tea is due to the mode of
preparation, and not to separate species of plant. Green tea contains
more tannin than black. The following table will show the
difference:--

=======================+===================+===================
| GREEN TEA. | BLACK TEA.
-----------------------+-------------------+-------------------
Crude protein | 37.43 | 38.90
Fibre | 10.06 | 10.07
Ash (mineral matter) | 4.92 | 4.93
Theine | 3.20 | 3.30
Tannin | 10.64 | 4.89
Total nitrogen | 5.99 | 6.22
-----------------------+-------------------+-------------------

The stimulating properties which tea possesses, as well as its color
and flavor, depend upon the season of the year at which the leaves are
gathered, the variety of the plant, the age of the leaves, which
become tough as they grow older, and the care exercised in their
preparation. Much depends upon the manner in which tea is infused. (1)
Use freshly boiled water; (2) allow it to infuse only three or four
minutes, in order to avoid extracting the tannin. When carefully
prepared as above, tea is not considered unwholesome for people in
good health.

COFFEE.

Coffee is made from the berries of coffee-arabica, which are dried,