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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 cjcowie@execpc.com.

Click any element below to see all the samples of that element, or click on the sample picture to go directly to the description of that sample.

Text and images Copyright (c) 2010 by Theodore W. Gray.

Selenium Rectifier
Selenium: Info | Spin | 3D
The Elements book Mad Science book Periodic Table Poster  Click here to buy a book, photographic periodic table poster, card deck, or 3D print based on the images you see here!