Hints for the Formation, &c. 147 



gical obfervations. On the other hand, whole provinces 

 of Europe might, in my opinion, be named, from which 

 it would be difficult to produce at prefent virtuofp's, 

 poets, philofophers, and correfpondents of a learned aca- 

 demy. 



VI. Agenda, or a Collection of Obfervations and Rcfearches 

 the Refults of which may ferve as the Foundation for a 

 Theory of the Earth. By M. de Saussure. From 

 Journal des Mines. No. XX. 



[Continued from page 41. ] 

 CHAP. VI. 



Obfervations to be made on Rivers and other Currents of 

 Mater. 



,E 



iXTENT of their courfe, and their inclination from 

 their fources to their mouth. 



2. Their dimenfions, breadth, depth and velocity in the 

 different parts of their courfe. 



3. Quantity of their periodical increafe and decreafe at 

 different feafons; their temperature during thefe feafons; 

 and the caufes of thefe variations. 



4. Limits and caufes of their extraordinary inundations. 



5. Whether they are navigable, and to what diftance 

 from their mouth ? 



6. The nature, purity, and falubrity of their waters. 



7. The nature of the fand or mud which they carry along 

 with them ; and to what diftance they may be traced on the 

 banks or at the bottom of the fca where their mouths are 

 fituated. M. BelTon evenwifhes that the traveller fliould be 

 furnifhed with a wooden velTel (febillc) to warn the fand 

 and f( pa rate the more ponderous particles, which mayconfift; 

 cl juttul or precious ftones. The motion of the waves is alio 



L % often 



