Day 16 - Nov 2, 2007

Cracking rock with Wedges and Feathers

Drilled some 1/2 inch holes in the rock.

Put in wedges and feathers (also called wedges and shims).

Hit them in with a hammer, rotating between them. You can tell one moves easier after you have hit the others.

After awhile it cracks. Usually strangely quietly.

And then you can remove the rock and the wedges/feathers.