THE CONSTRUCTION OF PONDS. 75 



of the ponds but merely the plan. These ponds 

 are situated in a deep ravine, of about one hun- 

 dred and twenty rods in length, the water being 

 supplied from numerous large springs along the 

 whole course of the ravine. The lower pond is 

 much the largest, being some fifty rods or more 

 in length, four or five rods in breadth, and some 

 twenty feet deep. The middle one is. about half 

 the size of the lower one ; the upper one is still 

 smaller. It will be observed that the distance 

 between the two lower ponds is much greater 

 than it is between the two upper ones, and the 

 distance that the water has to pass is greatly 

 increased by putting in a flume zig zaged in the 

 manner shown in the cut. This flume or aque- 

 duct is constructed of plank, and is about three 

 feet wide and near two feet deep, and has parti- 

 tions placed in it every six feet through its entire 

 length. These, partitions are merely plank placed 

 edgewise across the flume, and are ten inches 

 broad. A notch is cut in the middle of the upper 

 edge of each plank, of a V shape, for the pur- 

 pose of directing the water through at one point, 

 in order that the trout may the more easily pass 

 up and down the flume. By means of this flume 

 and its partitions (which are in fact a succession 

 of little dams,) we convert a small stream of 

 water into one of quite respectable magnitude. 



