P. MCKELLAR — POT-HOLES NORTH OF LAKE SUPERIOR. 569 



The original pot-hole area was, most probably, much larger than it is now, as much 

 erosion of the mountain and vicinity seems to have taken place since the formation of 

 these holes. An area 200 by 400 feet would, I think, cover what now remains of the 

 perforated surface. Further examination may discover many more pot-holes here, as 

 portions are under cover of drift, alluvium and vegetable matter. 



The mountain is about 200 feet high, and at its base on the southeast side is a small 

 lake or pond ten or twelve acres in extent. When viewing the situation I was im- 

 pressed with the idea that these pot-holes are the work of a great stream, and that 

 this little lake is the chief pot-hole or pool into which the mighty fall of water 

 plunged; these seem the only traces left of that stream of the lone; past ages. L 

 named the mountain Pot-hole mountain, and the lake Pot-hole lake 



In the following notes of a number of the pot-holes, the measurements are approxi- 

 mate estimates made on the ground and not exact measurements. 



No. 1. The pot-hole is at an elevation of 150 to 200 feet above, and lies 100 to 150 

 feet to the west of Pot-hole lake. It is double; shorter diameter, 16 feet; longer, 

 30 feet. Wall, smooth and vertical, rises above the black muck filling, to the west 

 20 feet, to the north 6 feet, and to the east 2 feet. 



No. 2. The pot-hole is 6 feet in diameter, lies 40 feet to the eastward of and 8 feet 

 below no. 1. The western wall is elevated 4 feet above the eastern. 



No. 3. 5 by 6 feet in diameter, lies 15 feet north of no. 1. The back or west- 

 ern wall rises above the filling and the front portion of wall about 12 feet. 



No. 4. 4 by 5 feet in diameter ; lies from no. 1, N. 16° E. 120 feet. The western 

 wall rises 30 feet above the filling and the front. 



No. 5. 6 feet lower than no. 4. It is sub-triangular, with the sides 10 feet each. 

 The wall rises to the north 10 to 20 feet, with an inclination of 85° ; to the south- 

 west 25 feet ; to the southeast 6 feet ; and to the east 3 feet. 



No. 6. 5 feet lower and 8 feet to the east of no. 5. The wall rises above filling, 

 to the north 1J feet, to the east 1 foot, to the south 4 feet, and to the west 5 feet. 



No. 7. 5 feet above and 3 feet northeast of no. 5. It is round and smooth, filled 

 with black muck. 



No. 8. 7 feet to the northeast of and 10 feet lower than no. 5. It is 17 feet in 

 diameter, with the wall rising to the northeast 3 feet ; to the north 10 feet; to the 

 northwest 20 feet ; to the southwest 7 feet ; and to the east 1 foot. 



No. 9. 4 feet lower than and 10 feet east-northea>t of no. 8. Its diameter is 8 by 10 

 feet, increasing in size downwards. The wall rises about 5 feet above the earthy 

 filling all around. 



No. 10. 20 by 60 feet in diameter, filled with bowlders, earth, etc. 



No. 11. 4 feet in diameter, with a portion of the wall rising 10 feet. 



No. 12. 6 by 10 feet in diameter. The wall rise.-> to the west 16 feet; to the north 

 and the south about 8 feet. There are two small pot-holes in the top of the wall, with 

 diameters of 2 and 3 feet respectively. 



No. 13. 6 feet in diameter. The wall is smooth and rises in places to the heighl of 

 about 8 feet ; another hole 3 feet in diameter is distant 2 feet to the ea^t and is 6 feet 

 lower. 



No. 14. 12 feet northeast of and 8 feet lower than no. 13. 



No. 15. 6 feet in diameter. Lies 8 feet to the southeast of and is 10 feet lower than 

 no. 8. The wall is low to the east, 18 feet high to the south and the southwest, and 

 11 feet to the northward. 



No. 16. 12 feet east of and 8 feet lower than no. 15. 



