sulpheric acid and potassium cyanide are used to kill people,
very painfull and slow I might have missed this thread, but
please keep cyanide away from all acids unless you are expert in
their use. this stuff is lethal and effects are cumulative. All
the best Gerald
ARROWTOWN Information Site
http://www.arrowtown.co.nz
Arrowtown Opals& Jewellery
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