gg DRAlNIKG OF THE POND OF CITIS. 



usually followed by hivrd southerly winds, with hazy weather 

 or small rain ; Avhich Dr. Franklin, admitting the fact, sup- 

 l)oses to be a consequence of the clearness to the northward, 

 which renders them visible, and may have been produced 

 by long- rontinued winds from that quarter; for when the 

 -winds have continued long in one quarter, the return is of- 

 ten violent. T!ie later discoveries respecting ignited stones 

 which have fallen from the atmosphere, seem also to belong 

 to the subject of this paper ; but I cannot at this time consis- 

 tently with brevity enter upon them. 



II. 



Account of the Draining of the Pond ofCitis*. 



Draining -3- HE draining of ponds and marshes has always been con- 



ponds and ^^ sidered as a difficult enterprise; and it has frequently hap- 

 considered a pened, that works begun for the purpose have been relin- 

 Jifficulty. quished, before the object was attained, either because the 



local circumstances have occasioned too many obstacles, the 

 means employed have been inadequate, or the capital em- 

 ployed has fallen short, before the expected benefit could be 

 derived from the undertaking. 

 A successful To instruct and encourage the speculator, as far as is in our 

 instance given power, and enable him to furtiish aariculture with new land 

 as an example ' , , , it i , ,• , i 



tor the plough or the sithe, we hasten to publish the particu- 

 lars of the draining of the pond of Citis, which is now going 

 on. We shall point out the diflfjcuUies, that have been sur- 

 mounted ; and the new mechanical means, that have been em- 

 ployed. 

 Description of '^^^ pond of Citis is to the south-west of the department of 

 the pond. the Mouths of the Rhone, at a short distance from an arm of 

 the sea called the Pond of Berre. It is near the ponds of 

 Lavalduc, Pourra, Rassuen, &c. The different quality of 

 the waters 6f these ponds, and the dissimilarity of ^heir levels, 

 show, that they have no subterranean comjnunication with 



* Journal des Mines, No. 116, p. 137. 



eeck 



