Only skilled mountaineers are able to detect the marks that serve to guide the Indians, such as slight abrasions of the looser rocks, the displacement of stones here and there, and bent bushes and weeds.

When they did venture to indulge in what they called "overhead" fire, their friends in the forefront used to summon them after the performance, and reproachfully point out sundry ominous rents and abrasions in the back of the front-line parapet.

'He's got an abrasion on the knob of his right-hand front paw,' says he.

And now he saw that which he had not previously taken note ofan abrasion across the knuckles of Dale's right hand.

The size of the section under abrasion for each specimen is 2" X 2".

Thus nature lends a gradual protective hardening to a tender surface during abrasion with a coarser thing.