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much exactness my position at Ouschda. I found the 
longitude to be 4° 8' 0" W. from the observatory at Pa- 
ris, and the latitude 34° 40' 54'' N. At such an eleva- 
ted latitude the climate ought to differ very little from 
the European, but the desert which surrounds it ren- 
ders the air burning hot. I have felt, however, in the 
month of June, some days very refreshing, the sky fog- 
gy, and even some rain. 
I observed at Ouschda an eclipse of the moon, of 
which I shall give a description in the astronomical 
part of my journey. I should have made various other 
observations, but was prevented by circumstances, be- 
ing obliged to sacrifice every thing to my leading object. 
On my arrival, the chief and the principal inhabitants 
of the village told me that I could not proceed, as they 
had received that very day the news of a revolution 
which had broken out in the kingdom of Algiers, and 
that much blood had been shed between the Turks and 
Arabs at Ttemsen or Tremecen, to which I was going. 
I asked the chief of the village to furnish me with an 
escort; but he told me that he had not forces enough, 
but that he would try and arrange things to my satis- 
faction. 
Two days after, the chief and principal inhabitants of 
Ouschda requested the Shek el Boanani, who is the chief 
of an immediate tribe, to conduct me to Ttemsen. He 
first refused, but after a long discussion he left me, with- 
out any positive resolution. Several days passed in use- • 
less negociations. The rebels approached to the walls 
of Ouschda, and firtd several shots at the inhabitants, 
which killed two of them. My situation became worse 
and worse, for on the one side my means of subsistence 
were exhausted, and on the other I heard that my ene- 
