My
periodic table poster
is now available!
Cat's whisker detector closeup.
A closeup of a the galena crystal from a cat's whisker radio detector.
Source:
eBay seller jrschades
Contributor:
Theodore Gray
Acquired:
15 April, 2009
Text Updated:
15 April, 2009
Price:
$24
Size:
0.5"
Purity:
86%