1885. 7" long:
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1886. 8" tall:
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1887. This was sent in by a visitor:
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1888. An unidentified device that was submitted by a visitor who found it on the side of a road:
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It's just less than 2" long:
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1889. Around 5-1/2" tall:
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1890. 72" long, take a look at Neatorama for more guesses on this tool and a chance to win a T-shirt:
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Answers:
1885. A mechanical speed indicator, the numbers indicated on the dials are used to calculate the RPM when the point is placed against a rotating shaft for a suitable number of seconds:
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1886. No verifiable answer yet for this device:
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1887. This is most likely either a tamper for sand, dirt, etc., or a ramrod for a cannon:
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1888. A valve used to adjust the velocity that paintballs come out of the gun.
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1889. This is the mechanism from inside of a collapsible top hat:
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1890. A hand operated ice plow, used for finishing out the groove made by a horse drawn ice plow. After the ice plow had made grooves in the ice, an ice saw was used to finish the cut.
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I posted this ice saw a few years ago, it's 5'-7" long:
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In some parts of the country it's known as an ice knife.
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To submit photos, send them to the address in my profile.
Last week's set is seen below, click here to view the entire post.
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Black Ops Pro Tips
More discussion and comments on these photos can be found at the newsgroup rec.puzzles.