At 11:22 AM 12/11/98 -0500, you wrote:
>Hi,
>
>> Weeks ago  I left  my UV erasable chips under the sun for hours and I did
>>not notice any change (even using the magnifier glass someone
>>suggested)until they flew away from  my home balcony in 7th floor,just
>>because of the wind.

You wanted the program to go away didn't you? :)

>I have always heard that many types of glass do not pass UV well. You may
>need to use a UV lens for this instead. Also, the UV focus would be
>somewhat closer in toward the lens than the visible light foci.

Window glass (and glasses-glass) dosen't pass short UV.  The window on your
EPROM is quartz for that reason.
Now ask me why glasses places want to sell you a "UV coating"...
(Glass does pass long UV, but the hazard of that is highly debatable)