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The cleans and the dirties (21/07/17 22:33:19)
    My little granddaughters play with the sands at the seaside. Terribly dirty - but a quick rinse in seawater takes away all traces of dirtiness. So we can enjoy seeing shrimp and hermit crabs and crabs before the crowd appears.

    Clays and sands and oxides and alkoxides - useful substances - but what do the children learn in school?

    Stuff to teach grandchildren.

    Please grow up fast.

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