162 
SECOND BOOK. 
“ I wonder what there is in coffee to make us feel 
refreshed like the monk,” said May. 
8 . “ I will tell you; but I shall have to use some 
hard names. In the coffee there is a substance 
called caffeine. It is also present in tea under the 
name of theine ; and there is something nearly like 
it in chocolate, known as theobromine. 
9. “ Coffee, chocolate, and tea also contain an oil, 
which, in each case, gives the odour and taste that 
we know so well. 
“You know that we make very cooling drinks 
from some of our fruits and water,” continued Miss 
Brooks. 
10. “There is the drink which is made by pouring 
warm water over tamarinds; and that which is 
made by adding water to the acid juice of limes 
and citrons. Again, in the young cocoa-nuts we 
find a sweet and refreshing drink ready made for 
use.” 
n. You have not said anything about rum,” said 
May. 
“ No,” replied Miss Brooks. “ It is one of those 
drinks which contain alcohol, and which you and I 
can do very well without. Such drinks are quite 
unnecessary to people who are well and strong, 
though they are often useful in times of illness.” 
