THE SOURCE OF THE NILE, ay 
ferior to the fineft Spa. Drink largely of this without fear, 
according as your appetite requires. By violent perfpira- 
tion the aqueous part of your blood is thrown off ; and it is 
not fpiritous liquor can reftore this, whatever momentary 
ftrength it may give you from another caufe. When hot, 
and almoft fainting with weaknefs from continual perfpira- 
tion, I have gone into a warm bath, and been immediately 
reftored to ftrength, as upon firft rifing in the morning. 
Some perhaps will object, that this heat fhould have weak- 
_ened and overpowered you; but the fact is otherwife; and 
the reafon is, the quantity of water, taken up by your ab- 
forbing veffels, reftored to your blood that finer fluid which. 
was thrown off, and then the uneafinefs.occafioned by that 
want ceafed, for it was the want of that we called uneafinefs.. 
In Nubia never fcruple to throw yourfelf into the coldeft ri- 
ver or {pring you can find, in whatever degree of heat you are., 
The reafon of the difference in Europe is, that when: by vio- 
lence you have raifed yourfelf to an extraordinary degree 
of heat, the cold water in which you plunge yourfelf checks 
your perfpiration, and {huts your pores fuddenly. The me- 
dium is itfelf too cold, and you do not ufe force fufficient to 
bring back the perfpiration, which nought but ation occa- 
fioned; whereas, in thefe warm countries, your perfpiration 
is natural and conftant, though no action be ufed, only from 
the temperature of the medium; therefore, though- your 
pores. are fhut, the moment you plunge yourfelf in the cold 
water, the fimple condition of the outward air again covers 
you with pearis of fweat the moment you emerge; and. 
you begin the expence of the aqueous part of your blood 
afrefh from the new ftock that you have laid in by your 
immertfion. 
, For 
