AtDDtA1: Galvanic light (was "Sightings")

[Ya Sam]

"Galvanic halo" is a very rare phrase. However there are some curious things 
related to galvanic light.

"ART. XV.-- A Daguerreotype Experiment by Galvanic Light; by B. SILLIMAN,
Jr., A. M., of the departments of Chemistry and Mineralogy, in Yale
College, and WM. HENRY GOODE, M.D.

In November, 1840, we succeeded in obtaining a photographic impression,
by galvanic light reflected from the surface of a medallion to the
iodized surface of a Daguerreotype plate.  The large battery in the
laboratory of Yale College, consisting of nine hundred pairs of plates,
ten inches by four, was charged with a weak solution of sulphuric acid,
and its poles adjusted with charcoal points, in the manner which is
customary, when an intense light is to be produced by means of this
instrument.  Two pictures were obtained; one of which is made up of a
blur, or spot, produced by the light from the charcoal points, the image
of the retort-stand, on which a medallion of white plaster rested, and
the image of the medallion, but the lines on its face are not given."

http://www.daguerre.org/resource/dagnews/06-27-96.html

"The craze for photographing 'spirits' was rooted in the popularity of 
Spiritualism and psychic research that developed during the period from the 
1860s to the 1930s. The appearance of ghostly figures, spirit writing and 
ectoplasm in these portraits was considered by many as nothing short of 
miraculous. In 1874 the eminent chemist and physicist William Crookes used 
the galvanic light of electric lamps to photograph the beautiful figure of 
the spirit Katie King, which had supposedly been materialized by the young 
Hackney medium Florence Cook. "

http://www.bl.uk/news/2006/pressrelease20060530.html

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