Set 350

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2011. 2" square:

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2012. Sent in by a visitor who is looking to identify this device, the part with the holes is made of rubber and the holes do not go all the way through:

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2013. From the early 1900s:

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A similar kit from 1890:

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2014. 6" long:

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Photos by Christopher Young

























2015. Someone at an antique machinery show was selling these devices for $100 each:

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2016. 6-1/2" x 5-1/4":

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There are three separate compartments:




Each section has a hinged plate covering it:



The first two compartments look the same:

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The third section:





















Answers:


2011. A watchmaker's memory plate for keeping track of parts when working on a watch:

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2012. A vulcanizer that was used to repair the inner tubes of old tires:

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2013. These are both police fingerprint kits:

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2014. A clinch cutter or buffer, used to unclinch the nail when removing a horseshoe. A shoeing hammer is used to drive the buffer under the clinch thus cutting off or straightening the end of the clinched nail. In the photo below, the right end is the cutter and the left is the pritchel that is useful for cleaning or widening the nail holes in the shoe.

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Photos by Christopher Young

























2015. These are hydrogen fuel cells, supposedly they will increase your fuel mileage up to 60%. The seller states:

Turn water into hydrogen gas with electrolysis. Hydrogen's octane is 137% and can be burned in your engine with your gasoline or diesel fuel. This has many positive effects on your vehicle and the environment. When you burn hydrogen with the fuel and air mixture you increase the fuel mileage. It cleans the engine, increases the power, decreases emission and decreases dependencies on oil. Hydrogen fuel is not a new concept. It is a 90 year old technology. The hydrogen fuel cell generator produces hydrogen on demand and does not store it.

Easy to install, you will need to mount the unit in the engine compartment. Now add distilled water and baking soda to the unit. Then you will need to hook up a positive fused line to a 12v. keyed source 3 amp draw per fuel cell and a line to a negative source. Next, run a vacuum line to the air intake. No adjustment to the engine is needed.

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The seller says that he gets 25 miles per gallon when using them on his truck, compared to 12 miles per gallon without the fuel cells.





























2016. A fly fisherman's Richardson fly box:

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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.