fay hot, fome other explanation is necefiary concerning t h e
place where we are, in order to giv e anadequate idea o f the -
fenfations o f that heat upon the body, and the effedts o f it
upon the lungs. The degree o f the thermometer conveys,
this very im p e r fe ftly ; go0 is exceflively hot at Loheia it>,
Arabia Felix, and yet the latitude o f Loheia is but 15°, whereas
90* at Sennaar is, as to fenfe, only warm, , although Sen-.-'
naar, as we have faid, i s in lat. 13°;.
A t Sennaar, then, I'call'itOT/i/.'when one, fully; cloathed;
and at reft, feels himfe lf in want o f fire. I call it cool, whenr
one, fu lly cloathed an d a t reft, feels he could bear more covering
all over, or in part, more th an iie has then on. I
call it temperate-, when a man, fo cloathed an d at reft, feels^na
fuch want, and can take moderate exercife, fuch as walking
about a room without-fweatdng,’ _ I call it -warm-, when a m a n ,.
fo cloathed, does not fweat when at reft, but, upon moderate
motion, fweats, and again'cools. I call it hot, when a man ,
fweats at reft, and exceflively on- moderate, motion. I call?
it very hot, whep a,man, with thin or little cloathing, .fweats
much though at reft.: I-call it excejfive hot, when a man, in his.
fliirt, at reft, fweats exceflively, .when all motion is painful,-,
and the knees feel- feeble as i f after a fever.. I call it extreme.-
hot, when the.ftrength fails, a difpofition to faint comes on,-
a ftraitnefs is found-in the temples, as i f a - fmall cord, was
drawn tight around the head,..the voice impaired, the fkin
dry, and the head feems more than ordinary large and lig h t ..
This, I apprehend,, denotes death at hand, as we have feen -
in the inftance o f Imhanzara, in our journey to T eawaj buts
this is rarely or never effected by the fun alone, without the
addition o f that poifonous' wind which purfued us th rou gh ;
Atbara, a n d : w ill be more particularly defcribed in our;
journey.
journey down the defert, to which Heaven, in p ity to mankind,
has confined it, and where it has, no doubt, contributed
to the total extinftion o f every thing that hath the breath
o f life. A thermometer graduated upon this fcale would
exhibit a figure very different from the common o n e ; for i
am convinced by-experiment, that a web o f the fineft muf-
lin, wrapt round the body at Sennaar, will occafion at midday
a greater fenfation o f heat in the body than the rife o f
5° in the thermometer o f Fahrenheir.
At Sennaar, from 70° -to 78° in Fahrenheit’s thermometer
is co o l; from 79° to 92° temperate; at 920 begins warm.
Although the degree o f the thermometer marks a greater
heat than is felt by the body o f us ftrangers, it feems to me
-that the fenfations-of the natives bear ftill a lefs proportion
to that degree than ours. -On -the 2d o f Auguft, while I
•was ly ing p er fe illy enervated on.a carpet, in a room delug
e d with water, at twelve o’clock, the thermometer at 116°,
I faw feveral black labourers pulling down a houfe, workin
g with great vigour, without any fymptoms o f being at
all incommoded.
T he difeafes 6 f Sennaar are the dyfentery, or bloody flux,
fa ta l in proportion as it begins with the firft o f the rains, or
the end o f them, and return o f the fair weather. Intermitting
fevers accompany this complaint very frequently,
which often ends in them. Bark is a fovereign remedy in
this country, and feems to be by fo much the furer, that it
purges on taking the firft doze, and this it does almoft w ithout
exception. Epilepfies and fchirrous livers are likewife
very frequent, owing, as is fuppofed, to their defeating or
diminiihing perfpiration, or flopping the pores by conftant
j P s u n it ion.