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| Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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What is it? Set 259
On Thu, 20 Nov 2008 20:52:10 +0900, "DiggerOp"
wrote: "Rob H." wrote in message ... We need help from a Civil War expert for the first piece in this week's set: http://55tools.blogspot.com/ Rob 1465 Could it be a device for indicating wind direction by compass point? Perhaps used in gunnery? It could also indicate velocity. The arrow head is horizontal and the nut could be run in or out to balance the arm against the wind. |
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