Re: Volcanoes and Gold, the Metal
From: donald j haarmann (donald-haarmann_at_worldnet.att.net)
Date: 08/28/04
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Date: Sat, 28 Aug 2004 09:50:42 GMT
"donald j haarmann" <donald-haarmann@worldnet.att.net.
>
> -----------
> If you check back I believe you will find the green tint of thin gold was
> first discovered by Faraday!
>
----------
http://personal.bgsu.edu/~nberg/faraday/diary4.htm
Page 4: October 22nd, 1856 - December 16th, 1856
15183. Have some pure gold leaf from Mr. Smirke, beaten by Marshall-he gives it as averaging 17 dwt.
or 408 grains per 2000 leaves; i.e. 0.2 of a grain per leaf. It is a fine rich orange yellow-very soft and
flexible, so that it requires much more care in handling it on the cushion and hangs on the knife with
different draping folds to ordinary gold leaf. It is sin[g]ularly mottled in the middle of the leaf, some
parts being seemingly 3 or 4 times as thick as other[s]. At the side it streaks out like other leaf.
Colour a fine warm green by transmission.
--
donald j haarmann
-----------------------------
Experiments should be reproducible—
they should all fail in the same way.
Anon.
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