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Tuesday, 6 March 2012

Seep well.

I dug one of these the other day to illustrate the concept to some students. They seemed quite interested and were fascinated to see it refill over and over again.
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1 comment:

  1. Keith8 March 2012 at 08:53

    Yes, & they are a bu**er when you are putting fence post in!!!
    Keith.
    http://woodsrunnersdiary.blogspot.com.au/

    ReplyDelete