hy the Mud of the Nile. ^^ 



Country into particular Diftrids ; conveying the Water to di- 

 ftant Parts, and preventing of any fuddainlnvafions;) were 

 intended_, not only to carry off the fuperfluous Water, and 

 thereby prevent the Inundations, from being hurtful ; but to 

 convey and diftribute them likewife, with greater OEconomy 

 and Conveniency, to the very Skirts of the Mountains. 



Wherefoever likewife we meet with any Banks or Mounds, j^^J^/^^^^ 

 (whether they are intended, according to the Exigence of the JJ^atSfstrelm 

 Country, to Ihut out, receive or retain the Water; as it was g'^'j^^i*" ^^^ 

 fometimes pradlifed in the Outlets to the Lake of Myr'is ' •,) 

 there they are much of the fame Height and Quality, both 

 along the Edges of the main Stream, and along the Edges of 

 the correfpondent Branches and Canals. What determinate 

 Height of Water therefore would be requifite to overflow and 

 refrefli the Grounds, adjacent to the one, would be neither 

 more nor lefs fufficient for the other. As the Water therefore 

 in the Canals, from the very Nature, Intention and Strudlure 

 of them, muft always keep Pace, and be of the fame horizon- 

 tal Height with the main Stream; the very fame fertilizing 

 Sediment, which, at any Inundation, was brought down by 

 This^ would, ceteris paribus, be communicated likewife to 

 the correfpondent Branches, or Canals. Similar Effedls would 

 confequently follow ; and one Part of Eg/pt, ( I mean under 

 the fame Parallel,) would be no more accumulated with Soil, 

 than another. As this fuppofed Matter of Fa6l then may be 

 difputed, fo will the Conclufion likewife which He deduces 

 from it; (p. xso.) viz. that the Nile need not he Jo high, over- 

 flo7i/ing hy the Banks of the Canals', on the Suppo/ition (which 

 Suppofition requires to be further fupported) that the Ground 

 is lower at a 'I)i fiance from the River. 



If then the fame Height of Water is equally required, bothThe^Hght 

 in the collateral Branches and in the main Stream, to overflow commenfu- 



rate to the 



the adjacent Lands; what determinate Height of it foever is'^eceffary^^ 

 or has been neceflary, for thatPurpofe, in any given Age, orthejover- 



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 oJaTav, ■n^imTif)'^ IvsiayTO To/tn imfju/.ai Ik f^'-A-mv ■^oHa/^oi. HcTod. Eut. p. 144- KrtTU Tmaw Js 

 7W ■)^'):)Ji im &s M5w9J«f bh SaVaoretv oou5; Tnjy.m; in. n •m-TV^'i :})ci^V)a!, tva -mt y^ auylcofMjkf Tav y^fTmf 

 ■mtavw mMrifxas i^ |i/)'«f) tk?; /fe' (t!^> c^^^.«^uf w huav ^[ju^iaus )^ TWffJ To/f ■mnt! inrn.^"^ gis»v» vjj 



"tzoiJiW TW ^fif. Diod, Sic. 1. I. p. 76. 



y^TTihfiit. Strab. I. 17. p. jy?. 



O 1 Period 



