Charles Cowie (1)

I got to know Charles Cowie when he sent some information about osmium phonograph needles and pen nibs. He's been collecting elements for a while too, and it turns out we made many of the same choices for samples. I traded one of my "osmium" photograph needles for a selenium rectifier of his. His email is

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Text and images Copyright (c) 2010 by Theodore W. Gray.
Selenium Rectifier
Source: Charles Cowie
Contributor: Charles Cowie
Acquired: 9 September, 2002
Price: Donated
Size: 2.5"
Purity: >90%