Extract of Tea and Coffee.--Dr. Rae speaks very highly of the convenience
of extract of tea. Any scientific chemist could make it, but he should be
begged to use first-rate tea. The extract from first-rate tea makes a
very drinkable infusion, but that from second-rate tea is not good, the
drink made from the extract always a grade inferior to that made directly
from the leaves. By pouring a small quantity of the extract into warm
water, the tea is made; and, though inferior in taste to properly made
tea, it has an equally good effect on the digestion.
Extract of coffee is well known. I believe it can be made of very good
quality, but what is usually sold seems to me to be very much the
contrary and not to be wholesome.
Tea and Coffee, without hot water.--In Unyoro, Sir S. Baker says, they
have no idea of using coffee as a drink, but simply chew it raw as a
stimulant. In Chinese Tartary, travellers who have no means of making a
cup of tea, will chew the leaves as a substitute. Mr. Atkinson told me
how very grateful he had found this makeshift.
WATER FOR DRINKING.
General Remarks.--In most of those countries where travelling is arduous,
it is the daily care of an explorer to obtain water, for his own use and
for that of his caravan. Should he be travelling in regions that are for
the most part arid and rarely visited by showers, he must look for his
supplies in ponds made by the drainage of a large extent of country, or
in those left here and there along the beds of partly dried-up
water-courses, or in fountains.
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