Travelling , as performed by Camels . r 43 
Thus the mean daily rate of the heavy caravan, appears to be 
18,64. Britifh miles, reckoning two miles and an half for each 
hour; and 19,06 if taken at 2,56 : and the mean rate of the 
light caravan 22,17 miles, at 2§ ; 22,7 at 2,56. 
In order to apply this fcale with effect, to the African geo- 
graphy, it is neceflary to ftate the number of days that the 
caravans ufually halt on the road ; for as yet I have only confi- 
dered their rate of motion : but it is evident, that if the length 
of the journey in the grofs, is given, the requifite information 
will not be obtained, without a previous knowledge of the time 
loft by neceiTary, or unavoidable halts on the road. My enquiries 
have furnifhed me with an account of 13 halts, to 149 days of 
travelling; or, which is the fame thing, 13 halts out of 162 
days, reckoned from the time of departure, to the time of the 
arrival of the caravans at the place of deftination : that is, 1 
halt to I2f travelling days. This, of courfe, mod be de- 
duced from the aggregate of the diftance : or, fhould it be 
averaged on each day, the heavy caravan day rauft be reckoned 
at 17,14 miles inftead of 18,64; an ^ that of the light caravan 
20,4, inftead of 22,17; when the hourly rate is taken at two 
miles and an half. 
It alfo remains to be dated, from the proportion that the 
road diftance bore to the dire6b diftance, by the trace of Mr. 
Carmichael’s route; what length in dired diftance, and 
in geographic miles, may be allowed for each day, for the 
heavy caravan, on fimilar lengths of journey, and over fimiiar 
trads of country. It appears then, that on the 28 days be- 
tween Aleppo and Rackama (oppofite Mesjid Ali) the mean 
length of the day’s journey, in dired diftance, is about 1 5 J 
geographic miles : and on the whole 45 days between Aleppo 
and Buflorah, 13,8 fuch miles. But this is without any allow- 
j ance 
