“This is a lump of green glass with white inclusions or spots in it. The glass has sharp and smooth edges and appears to have been shattered.”
“Lovellite. In the 1920s, in Lovell, Wyoming, a glass factory had a devastating fire. Exact dates vary depending on source and lore. What is certain is what it produced in the aftermath. The mineral wollastonite developed in the globs of glass that melted in the fire. Inclusions from spherical to octagon crystallography developed in the green-blue glass. Locals gathered the material and sold it to tourists and travelers passing through. Word got to the mineral collector community, and popularity peaked because of the uncommon mechanism that caused it.”
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Abijah 1 year ago
at number 5 - its a stamp for the usage of a electric circuit. Just mirror it an you will see. greetings
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Oswald 1 year ago
Abijah,
Not so much as a stamp, as a printing plate. Before ink jet printers, they would ink these up, and press paper against them.
Not so much as a stamp, as a printing plate. Before ink jet printers, they would ink these up, and press paper against them.
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Charles 1 year ago
Abijah,
The dial on the right sets the resistance in Megaohm as far as I can read. If I see that correctly its the printing plate for manual for an old X-Ray machine. Only those kathode tubes (at the bottom) would akquire such high voltage (200V)
The dial on the right sets the resistance in Megaohm as far as I can read. If I see that correctly its the printing plate for manual for an old X-Ray machine. Only those kathode tubes (at the bottom) would akquire such high voltage (200V)
Not so much as a stamp, as a printing plate. Before ink jet printers, they would ink these up, and press paper against them.
The dial on the right sets the resistance in Megaohm as far as I can read. If I see that correctly its the printing plate for manual for an old X-Ray machine. Only those kathode tubes (at the bottom) would akquire such high voltage (200V)