fiROSION ON BAISIN RIVER 



345 



high; 69 per cent of them are on the right. In almost every case the 

 downstream end of the scaur is absolutely bare; then farther up it has 

 patches of slipped sod on it ; then grass and trees, with occasional breaks 

 showing the bare ground, and finally perhaps a well grassed slope, at the 

 bottom of which is naked clay. This accords perfectly with the sweeping 

 downstream of a meander system that Davis has described in the paper 

 referred to. The upper part of the scaur is grassed simply because it is 

 older. The same thing has been observed at other points. 



In the seven cases of the sort that occur here 42 per cent of the scaur 

 was bare — that is, of an average 463 paces of length the lower 193 were 

 bare, the last 268 grassed over. The actual pacings are, naming the lower 

 part first: 100-773, 468-135, 200-133, 195-425, 186-44, 30-70, 175- 

 300. 



In no case was a bluff counted as scaur unless it showed active move- 

 ment downhill. Mr Charles C. Colb)', instructor in geography in the 

 State Normal College, made independent pacings and estimates of points 

 of beginning and ending. His results agreed with the writer's within 

 1 per cent. Only 37 per cent of the naked scaur was on the right, but 

 the grassed part is properly included in the count. The results are very 

 consistent. Taking them in three groups, they are : 



Scaurs. 



Jji'u.utli of scaur 

 in [)aces. 



Per cent of scaur 

 on right. 



Right. 



Left. 



1- 4 . 

 .1- 8 

 9-14 



1,;!30 



94fi 



],()7a 



838 

 :!00 

 1)20 



()1 

 76 

 73 



Of the fourteen, ten are on the right, averaging 395 paces long each, 

 and four on the left, averaging 439. Here are scaurs four times as long 

 as those on the Eouge, more frequent on the right than on the left ; but 

 the average individual on the right is not quite so long. That the Eaisin 

 here is standing well to the right is beyond question. Driftwood shows 

 the plain is well flooded. 



This character begins on the southern branch of the Eaisin, as has been 

 said, about a quarter way from the elbow at Blissfield to Dundee. Above 

 this point to near Adrian, flood-plain is mostly lacking. Mr Colby notes 

 for this tract, "ISTearly all the way the river flows between well defined 

 banks on which the high-water mark shows plainly," and the writer found 

 the same thing east of Blissfield. There is active erosion of the bank at 



