Sorry to post twice on this issue, but I just recieved an email with an
attachment from Heilyser Tech, who manufactures an oxalic acid vaporizor.
It contains, in English, some of the data mentioned in the last post:

> "from 95 beekeepers from seven European countries tested the Varrox®
> evaporator of the company Andermatt BIO CONTROL AG.  The data of
altogether
> 1,509 treated bee colonies were entered and analysed.  In the field test
> altogether 797,744 mites and 197,169 bees were counted..."
>

I doubt that the listserver will handle an attachment, so if anyone wishes
to email me privately, I'll send it directly.

Based on the information contained in the document, it looks as if oxalic
acid vaporization is very effective, and leaves no residues above normal
background levels.

Cheers,

Todd Fillmore
Shrewsbury, Vt
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