540 D. MILNE HOME ON HIGH-WATER MARKS ON THE 
Eyemouth brick clay. The nearest strata of coal and lime are in Nor- 
thumberland, about 20 miles to the south, and in East Lothian about 25 
miles to the north-west. 
2. The forms of the sand and gravel hills in Berwickshire, deserve atten- 
tion. They are of three kinds— 
(1). The commonest are round-backed knolls, the crest of which is from 
30 to 50 feet above the adjoining general surface of the land. 
One point worthy of notice about them is, that they are generally steepest 
on the west fronts. 
When situated on the south side of the valley, the north-west front is 
steepest; on the north side of the valley, the south-west front is steepest. 
(2). Another form taken by these drift hills, is that approaching an ellipse. 
Some are as much as a mile in length, and several hundred yards in width. 
Kaims in Berwickshire, as represented on the one-inch shaded Map of the Ordnance Survey. 

Fig. 12. 
The above set of ridges marked A, cross at The above set marked B, cross at right angles a line 24 
right angles a line 24 miles in length, miles in length, drawn between Hilton and Ladykirk. 
drawn between Dove-Cot Mains and Len- The direction of these ridges is about W. by S. (mag- 
nel. The direction of these ridges is about netic). 
W.S.W. (magnetic). 
Another interesting feature about these long ridges, is their general paral- 
lelism to one another. ‘ 
As this is a point to which little attention has hitherto been given, the above ~ 
fig., No. 12, is offered in illustration. The ridges have been copied as exactly as 
possible from the 1-inch shaded map of the Ordnance Survey. The Ordnance 

