THE SOURCE OF THE NILE. 35 



end. Black fpots are frequently found on the breaft and 

 belly of the dead perfon. The belly fwells, and the ftench 

 becomes infufferable in three hours after death, if the per- 

 fon dies in the day, or if the weather is warm. 



The next common difeafe in the low country of Arabia, 

 the intermediate ifland of Mafuah, and all Abyffmia, (for the 

 difeafes are exactly limilar in all this tract) is the Tertian 

 •fever, which is in nothing different from our Tertian, and 

 is fuccefsfully treated here in the fame manner as in Europe. 

 As no fpecies of this difeafe (at leafl that I have feen) me- 

 naces the patient with death, efpecially in the beginning of 

 the diforder, fome time may be allowed for preparation to 

 thofe who -doubt the effect of the bark in the country. 

 But ftill I apprehend the fafeft way is to give fmall dofes 

 from the beginning, on the firft intermiffion, or even 

 remiffion, though this mould be fomcwhat obicure and 

 uncertain. To fpeak plainly; when the flomach nau- 

 feates, the head akes, yawning becomes frequent, and 

 not an exceffive pain in the nape of the neck, when a fhiver- 

 ing which goes quickly off, a coldnefs down the fpine, a 

 more than ordinary cowardlinefs and inactivity prevails, 

 (the heat of the climate gives one always enough of thefe 

 lafl fcnfations) ; I lay, when any number of thefe fymptoms 

 unite, have recourfe to the powder of bark infilled in water; 

 ftiut your month againlt every fort of food; and, at the 

 o-ifxs, your difeafe will immediately decide its name amon 

 the clafs of fevers. 



rr 

 O 



All fevers end in intcrmittents; and if thefe intermittcnts 

 continue long, and the firft evacuations by the bark have 

 not been copious and conftant, thefe fevers generally end 



E 2 in 



