! Travelling , as performed by Camels . 
*39 
Before I quit the fubjed of the hourly rate, I fliall obferve, 
that the road diftances in Mr. Carmichael’s traverfe table 
are often thrown together in lines of very confiderable length, 
fuch as 20 miles and upwards; and very commonly in lines of 
5, 6, and p, and yet are all confidered as ftraight lines. By 
this mode, it is probable, that many fmall inflexions paffed 
unnoticed : and therefore the rate taken from the refults of 
Carmichael’s and Irwin’s obfervations, will be rather under 
the mark than otherwife ; but it is obvious, that no kind of 
rule can be found to corred it by. It is certain, that fewer 
inflexions are likely to occur in the Defer t routes, than in almoft 
any other ; not to mention that the long lines of diftance hap- 
pen chiefly in the open, level part of the route. The road 
diftance exceeds the dired diftance, by one fourteenth part of the 
latter only, between Aleppo and Mesjid Ali ; amounting to a 
fradion of ,168 Britifti mile on each hour; or in the propor- 
tion of 7 1 miles on each hundred of dired diftance. This, I 
confefs, is much lei's than I could poflibly have fuppofed ; and 
which nothing fhort of adual experiment could have induced 
me to believe. On the whole road between Aleppo and Buf- 
forah, the proportion is nearly 1 1 on each hundred, on Carmi- 
chael’s route: but his route over the Chaldean Defert was 
unufually circuitous ; and cannot be admitted to have any 
weight, in the determination of this queftion. 
One would exped that the inflexions of which no account 
is taken by Mr. Carmichael, would amount to at leaf!: half as 
much as thofe which are taken notice of; and fuch addition 
would make the whole hourly rate 2,56 inftead of 2,475. 
this is merely a fuppofition ; and it is pofiible, that the rate may 
not be higher than 2,52, the mean of the four other experi- 
U 2 ments. 
