« Where are the men's voices? | Main | Not so profound thought for the day. »

24 October 2007

Comments

Feed You can follow this conversation by subscribing to the comment feed for this post.

JAMES

interesting. i learnt about Moh's scale of hardness only whern studying geology advanced-level at the age of 18. i'm very impressed your teaching it to a 7 year old. now - can you recite the scale from 1 - 10. 1 is talc, 10 is diamond.. a test for you!

The comments to this entry are closed.

Screen Shot 2015-07-19 at 6.07.09 PM
My Photo

I think I read something somewhere about this

  • Google

    WWW
    bearing blog

Become a Fan