What are these?

[tractorbeast 27]

Does anyone know what these might be? I believe they are both ceramic, the black looks like it was glazed and fired in a kiln. These were found in the ground of a dirt floor garage. thanks

[JimD 3,345]

They might be ceramic heat cores for some sort of space heaters, The unit heats them up and they transfer heat to the room. That's my S.W.A.G. :)

Edited December 2, 2012 by JimD

[Kelly 1,028]

Traction devices for the dirt floor............ Sorry no idea, buts Jims sounds good.