" Mareotis form vaft rcfcrvoirs calculated to 

 " contain the iupcrfluous waters, and at 

 " length to fpread them over the adjacent 

 " plains. They raifed them upon the elevat- 

 " ed grounds, by means of vertical wheels, 

 " the invention of which is due to the E- 

 " gyptians. One ox was fufficient to turn 

 " them, and to water a vaft field. Thefe 

 " wheels gave to Archimedes, in his journey 

 ic into Egypt, the idea of the ingenious chain 

 " or chaplet, ftill made life of in our days." 



Page 229. " The waters are conveyed by 

 " aquedudls to the very fummit of the hills. 

 " They were received there in immenfe ba- 

 " fons hewn out of the rock; from whence 

 u flowing into the midft of defarts, they con- 

 " verted them into fruitful fields." 



1 age 232. " We may confidently aflert, 

 <c that upwards of one third of the lands for- 

 " racily in cultivation are metamorphofed in- 

 " to defarts." 



Page 235. " This negligence gives a mor- 

 " tal flab to agriculture. A whole diftridy 

 " which owed its fertility and its riches to 

 " the waters of a canal, no longer receiving 

 " a fufficient quantity, become uncultivated, 

 ** and abandoned. The Nile, in the cot. 



'" o'i 



