804 



THE YOUNG FARMER'S MANUAL. 



inwards, as they appear to be sliding in the figure, and obstruct 

 the free passage of the water. If two such stones were turned 

 around, with the covering stone remaining as it is represented in 

 the figure, the throat would carry a larger stream of water, and 

 little or no water would run between the side stones and the 

 sides of the ditch ; and the superincumbent pressure would tend 

 to keep the side stones in their proper places. 



418. Fig. 135 represents the side stones placed very improp 

 erly. Great care should be exercised in placing the side stones, 



FIG. 135. 



FIG. 136. 





VIEW OK BIDS STONES 

 IMPROPERLY PLACED. 



MANNER OF STONING 

 WITH THIN SIDE STONES. 



so as to have them of a uniform height, or of such a height that 

 the covering stones will rest on every side stone. If large and small 

 side stones are placed together, as shown in the figure, those that 

 the covering stones do not rest on, will be very liable to fall or 

 roll over into the water passage. When covering stones are 

 broad, the beginner should see that every side stone sustains 

 some superincumbent pressure. It is necessary, sometimes, to 

 make a little depression with a pick, for a side stone of peculiar 

 form, in order to have it lie well. 



419. Fig. 136 represents the most approved manner of stoning 

 a ditch, where most of the side stones are nearly or quite flat. 

 The sharpest edge of the side stones should be placed in the 

 corner of the ditch, in order to make the throat as spacious as pos 

 sible, and to prevent the water from forming a channel outside of 

 them. 



420. Fig. 137 represents a very good mode of laying the 



