They are used for checking Tyndall.

Marshall

marmar1...@aol.com wrote:

> In a message dated 8/7/00 2:46:43 PM Central Daylight Time,
> mdud...@execonn.com writes:
>
> << laser pointers are available at lots of
>  places in the States for little more than the batteries cost. >>
>
> And what are these used for?
>
> Marlene
> <")))><
>
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