4S2 TRAVELS TO DISCOVER 



fay hot, fome other explanation is necefTary concerning the- 

 place where we are, in order to give an adequate idea of the 

 fenfations of that heat upon the body, and the efFedls of it 

 upon the lungs. The degree of the thermometer conveys 

 this very imperfedily ; 90° is excellively hot at Loheia in 

 Arabia Felix, and yet the latitude of Loheia is but 15°, where- 

 as 90° at Sennaar is, as to fenfe, only warm^ although Sen-, 

 naar, as we have faid, is in lat. 1 3°. 



At Sennaar, then, I call it co/d, when one, fully cloathed 

 and at reft, feels himfelf in want of fire. I call it coo/, when 

 one, fully cloathed and at reft, feels he could bear more co- 

 vering all over, or in part, more than he has then on. I 

 call it temperate, when a man, fo cloathed and at reft, feels.no 

 fuch want, and can take moderate exercife, fuch as walking 

 about a room without fweating. 1 call it warm, when a man, 

 fo cloathed, does not fweat when at reft, but, upon mode^- 

 rate motion, fweats, and again cools. I call it /60/, when a man 

 fweats at reft, and exceftively on moderate motion. T call 

 it very hot, when a man, with thin or little cloathin.q;, fweats 

 much though at reft. I q^SWx excejftve hot, when a man, in his 

 Ihirt, at reft, fweats exceftively, when all motion is painful, 

 and the knees feel feeble as if after a fever; I call it extreme 

 hot, when the ftrength fails, a difpolition to faint comes on, 

 a ftraitnefs is found in the temples, as if a fmall cord was 

 drawn tight around the head, the voice impaired, the fkin 

 dry, and the head feems more than ordinary large and light. 

 This, I apprehend, denotes death at hand, as we have feen 

 in the inftanceof Imhanzara, in our journey to Teawa ; but, 

 this is rarely or never effecfted by the fun alone, without the 

 addition of that poifonous wind which purfued us through 

 Atbara, and will be more particularly defcribed in our 



journey 



