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Re: [Phys-l] heat/energy

On 01/28/2010 08:15 AM, ludwik kowalski wrote:

This made me think about drilling a hole with a dull bit.

Or how about ye olde fire plow and/or fire bow.
Illustrations and instructions can be found at:

These go together with the fire piston we discussed a
few days ago, in the matchless fire-making category.