160 
who, as well as ourselves, were returning. On the third 
of March, during the time we were encamped at El 
Hadda, the thermometer, placed in the open air in the 
shade at noon, marked 24|°# of Reaumur, the wind 
being west, with light clouds floating in the air. At 
three quarters past twelve, being placed in the sun, it 
marked 45§°,t which is more than half the heat of boil- 
ing water. Such is the climate of these countries in 
which the unhappy people are condemned to live as in 
a furnace. 
I was able only to collect two plants, and some stones 
at El Hadda. At three in the afternoon, although indis- 
posed, I set out with the caravan. 
We continued our journey at three in the afternoon, 
bending our way in general towards the west; after 
travelling the greatest part of the night, I desired them 
to halt until the break of day without alighting. In a 
short time after sun-rise we entered Djedda. 
Our camels accomplished the journey from Mecca 
to Djedda in twenty-three hours. I felt a great interest 
in observing the difference of the longitude between 
these two places, and prepared corresponding observa- 
tions, but unfortunately my watch stopped during my 
journey. The same accident happened to me during 
my first journey to Mecca, for it is impossible for a 
watch to support the violence of the movements of a 
camel, without being injured in some respect. 
I was not more proof than the watch against the jolt- 
ing of the camel, for I experienced ten or twelve dis- 
turbances of bile upon the road. 
On the morning of the 4th, notwithstanding my 
sickness, I took some distances of the moon from the 
* 8.71° Fahrenheit^ f 136*> Fahrenheit. 
