. Gold Mines of Georgia. 3 



and by protecting the strata beneath, they frequently produce other 

 phenomena in the directions and levels of the stream. 



Fig. 1, represents a portion of a river, or (on a horizontal plane) 

 a, 6, c, d and e are deposits, resulting from the transporting powder of 

 the currents, caused by eddies which arrest the gravel in its descent. 

 It is observed that all water courses, have a disposition to make their 

 channel straight by cutting off points and filling up the bends or 

 "bights," which latter is an indisputable consequence to the former, 

 for if the points/ and g are ever worn off to h i, the deposits a b, will 

 be formed and soon become covered by sand, &;c. deposited, when 

 the waters were subsiding from a freshet. Vegetation will encroach 

 as the water will require only a certain width of channel, for its ordi- 

 nary descent. 



