Philosophical transactions, Vol. L. Part II. For the year 1758.: Giving some account of the present undertakings, studies, and labours, of the ingenious, in many considerable parts of the world.Various
History
Philosophical transactions, Vol. L. Part II. For the year 1758.: Giving some account of the present undertakings, studies, and labours, of the ingenious, in many considerable parts of the world.
Various
Science -- Periodicals
I now thought of trying to get water more palateable; and often perused
the pamphlet above-mentioned, especially the quotation from Sir R.
Hawkins’s voyage, who “with four billets distilled a hogshead of water
wholsome and nourishing.” I concluded he had delivered this account
under a veil, lest his method should be discovered: for it is plain,
that by four billets he could not mean the fuel, as they would scarce
_warm_ a hogshead of water. When, ruminating on this, it came into my
head, that he burnt his four billets to ashes, and with the mixture
of those ashes with sea-water he distilled a hogshead of fresh water
wholsome and nourishing. Pleased with this discovery, I cut a billet
small, and burnt it to ashes; and after cleaning my pot, I put into
it a spoonful of those ashes, with the usual quantity of sea-water.
The result answered my expectations: the water came off bright and
transparent, with an agreeable pungent taste, which at first I thought
was occasioned by the ashes, but afterwards was convinced it received
it from the resin or turpentine in the pot, or pipes annexed to it.
I was now relieved from my fears of being distressed thro’ want of
water; yet thought it necessary to advise my people not to be too free
in the use of this, whilst we had any of our old stock remaining; and
told them, I would make the experiment first myself; which I did, by
drinking a few glasses every day without any ill effect whatever. This
water was equally light with the other, and lathered very well with
soap. We had expended our old stock of water before we reached England;
but had reserved a good quantity of that which we distilled. After my
arrival at Shields, I invited several of my acquaintance on board to
taste the water: they drank several glasses, and thought it nothing
inferior to spring-water. I made them a bowl of punch of it, which was
highly commended.
I have not the convenience of a still here, or should have repeated the
experiment for the conviction of some of my friends: for as to myself,
I am firmly persuaded, that wood-ashes mixed with sea-water will yield,
when distilled, as good fresh water as can be wished for. And I think,
if every ship bound a long voyage was to take a small still with Dr.
Hales’s improvements, they need never want fresh water. Wood-ashes
may easily be made, whilst there is any wood in the ship; and the
extraordinary expence of fuel will be trifling, if they contrive so
that the still may stand on the fire along with the ship’s boiler.
I shall think myself sufficiently recompensed, if any hints here may
tend to the relief of my brother sailors from the dismal extremity of
want of water; an extremity too little regarded by those, who have
never experienced it.
Public-domain text, read in full here on John Shaqi.
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