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Old 08-24-2010, 06:54 PM
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Ken Talbot Ken Talbot is offline
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Join Date: Jun 2002
Location: Revelstoke, BC
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I've got an old brass float, but have been puzzling over how to get a decent measure of its displacement. I think I've come up with something.

I found a small plastic jar that the float will just snugly fit into so it doesn't float. I put the float into the jar and filled it to just level, as near as I could make it out.



Next I carefully picked the float out of the jar with a fine dental pick.



then used a syringe to refill the jar

.

By my measure, it took 18.0 cc to refill the jar.

Looking at the whole thing, it seems to me that there is enough variability in trying to determine when a jar this size is "just full" to the same amount twice in a row, that this measurement might be a bit suspect. The syringe gives a good reading on the amount of water replaced, but the fill level concerns me a bit.

HTH...
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