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|  12th September 2019, 07:01 PM | #13 | 
| Member Join Date: Mar 2006 Location: Room 101, Glos. UK 
					Posts: 4,259
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			Ferric powder measurers would not be terribly bright as it can spark when the parts rub, non-ferrous brass is much safer and cheaper than bronze. Probably took a few missing fingers and other parts before the word got around, maybe why there are fewer old ferric ones. They blew up.
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