2749. Approximately 36" diameter:
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2750. 14" long:
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2751. Over 12 feet long:
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2752. Around 24" long:
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2753. 6" long, take a look at Neatorama for more guesses and a chance to win a T-shirt:
2754. This is a museum display, I'm mostly interested in the two small pieces in the foreground, no one has been able to determine their purpose:
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Answers:
2749. A surveyor's Land Measuring Instrument, when rolled along the ground the counter would show the distance in feet, patent number 2,121,867:
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2750. This is a clamp for holding a log on a one-man bucksaw, also called a drag saw, patent number 420,115:
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2751. A hand for a large clock with a 15' diameter dial, made by Verdin:
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2752. No answer yet for this tool:
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2753. This is a grapefruit knife, patent number 2,637,899:
2754. The plaque at the museum said this was a 'German Bleeder Set', the two glass items are blood-letting cups and the three large brass devices are multi-bladed mechanical scarificators. Haven't yet identified the two small parts, the one on the left looks like it could fit into the holes of the other piece. Closest that I could find to them is the small ring torch on this page.
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Last week's set is seen below, click here to view the entire post.
More discussion and comments on these photos can be found at the newsgroup rec.puzzles.