the Injlituté at Cairo. : ‘454 
Beauchamp communicated alfo feveral aftronomical obferva- 
tions, which are to be publifhed in the Memoirs of the In+ 
ftitute. 
C. Berthollet read a letter addreffed to him by C, Isinptades 
member of the French National Inftitute. That geometri- 
cian recommended to him to make obfervatiorts of the oc- 
cultations of the ftars by the moon. The fame member 
gave an account alfo of the procefles employed in Egypt for 
making indigo. They are exceedingly fimple, but imper- 
fect. It appeared, however, that by means of fome flicht 
changes the quality of this article might be much improved. 
C. Fourier read a note on the plan of a machine moved 
by wind, which might be employed for watering land. © The 
wheel expofed to the aétion of the wind is horizontal. Af 
its parts are fixed, and the wings are fo fituated that they 
always turnin the fame dire@ion, whatever be the direction | 
of the wind, 
Seventh Sitting, Vendemiaire 6, An. yr. I, 
C. Norry read a memoir concerning the column of Alex= 
andria called Pompey’s Pillar, in which he gave the dimen- 
fions of the principal parts of that monument. On this oc- 
cafion C. Dolomieu offered an opinion refpeéting the period 
when this column was erected, according to which it ought 
to be referred to the age that followed the reign of Conftan- 
tine. The chapiter and pedeftal exhibit the character of 
degradation, which diftinguifhes the architeCture of that 
time; but the fhaft feems to belong to an earlier period, 
when that art fill retained all. its purity. 
C. Savigny read a memoir on a new fpecies of zymphea. 
> 
The author gave an account of the characters common to 
that plant and thofe which bear the fame name, and pointed 
out the differences, 
C. Dutertre read a memoir on the eftablifhment of a 
{choo] of drawing. His propofal was referred to a com- 
miffion compofed of C, Denon, Rigel, Dutertre, Redouté, 
sucy and Norry, C. Coftaz 
