SOME NOTES ON ARBOR LOW AND OTHER LOWS. I 1 1 



give 90°, or the fourth part of a circle, as an angle of some 

 importance. At Arbor Low 60°, or the sixth part of a circle, 

 is undoubtedl}' of importance. The square with an internal 

 angle of 90°, and the equilateral triangle with an internal angle 

 of 60°, would be amongst the first mathematical figures to be 

 used. 



Note 3. — The Low on the Old Hill, Ashbourne, is of 

 peculiar construction. It bears traces of a raised terrace run- 

 ning all round the mound, or low proper, giving somewhat the 

 appearance of a soup plate turned wrong side up. I only 

 know one other low of this construction. This second instance 

 is on the hill above Okeover to the north of the road leading 

 to Blore. The raised terrace is here very evident. This is 

 locally called " Arbor Low," but the name must not be con- 

 founded with that of the stone " circle." 



XoTE 4. — May I make a somewhat fanciful suggestion, which 

 may be applied to the positions of the hills as seen from Arbor 

 Low and Hare's Hill ? The sections show the appearance 

 under circumstances of ordinary atmospheric refraction. 

 Refraction is greatest at sunrise and sunset, so it may be 

 possible that the positions of the hills would appear to vary. 

 If so, at sunrise, from Arbor Lo\v, Longstone Edge would show 

 below the line of sight from Arbor Low to Stannage ; as the sun 

 got higher Longstone Edge would appear to rise. On the 

 other hand, the distant hill tops — Chinley Churn from Arbor 

 Low and Axe Edge ( ? Shining Tor) from Hare's Hill — would 

 at sunset appear to grow above the intervening obstructions. 

 I am again very diffident about this. 



XoTE 5.- -I may mention a few lows and other antiquities 

 to which I have not had an opportunity of applying the angle 

 30° west of north. There is {a) Gib. Hill, near Arbor Low. I 

 may have been wrong in regarding this as a " hill-top " low, and 

 I have never had time enough when at Arbor Low to examine 

 it. {b) A low shown on the Ordnance map near Wyaston. {c) 

 A tumulus, marked on the Ordnance map, near Bentley Hall, 

 between Alkmonton and Great Cubley. {d) The stone circle 



