CHAP. 37.—METHODS OF PROVIDING AGAINST THE INCONVENIENCE
OF DRINKING SUSPECTED WATER.
As persons out at sea often suffer great inconvenience from
the want of fresh water, we will here describe some methods
of obviating it. Fleeces are spread round the ship, and on
becoming moistened with the exhalations arising from the sea,
the water is wrung from them, and found to be quite fresh.
Hollow balls of wax, also, or empty vessels sealed at the mouth,
upon being let down into the sea in a net, become filled with
water that is fresh and potable. On shore, too, sea-water may
be made fresh, by filtering it through argillaceous earth.
By swimming in water of any kind, sprains of the limbs in
man or beast are reduced1
with the greatest facility. Persons
when travelling, are sometimes apprehensive that the use of
water, the quality of which is unknown to them, may prove
injurious to their health: as a precaution against this, they
should drink the suspected water cold, immediately after leaving