I'm quite familiar with metric and nonsensical units and their conversion. I was rounding and don't think it would make any difference to a diver...
Doing a believable theoretical calculation is probably not possible. The properties of liquids and metals when impacted rapidly with huge force,...
Seems speed of the coining press would be a factor. Water can be pretty resistant to flowing if hit suddenly. Try diving into water from 6 feet...
Ask and ye shall receive. Apology for graininess of pics, but they're old. First pic is the obverse. Second pic is the reverse, which is...
Gosh. Is this a near-like?:) Thanks. Cal
I'm not really an error collector, but do own an ancient brockage. I see struck-through oil/grease coins offered for sale. I'm curious whether a...
Yeah. I forgot to mention that you have to lacquer them first. Cal
Yeah. You can float your 1804 silver dollars on it. Cal
There is an active recycling market for mercury. Problem for some folks is that their quantity of mercury is too small or in the wrong form for a...
Nerve damage ... no. Neuronal damage ... yes, in some cases. Cal
Hope your dad is careful. Mercury can be used to extract and purify gold in a way that is safe for the operator and for the environment. Main...
As far as federal regs go, up to 11 lbs of mercury can be shipped by air without any special label other than toxicity. Individual carriers can...
If you have older gold coins, especially 19th century and earlier, chances are very high that the gold was extracted and/or refined with mercury....
Nice! Let's see your some of the others. Cal
I've attached a gif file that uses the same two images contained in Ron's motion gif, but with a gradual dissolve. This was done by bursting the...
Nice post, Ron. I think animation is great, especially for a coin that one is considering buying. However, an option to freeze it and step...
"Think of how stupid the average person is, and realize half of them are stupider than that." George Carlin
@C-B-D recently started a thread on the scarcity of MS60 grades awarded by TPG's. So, maybe it's time for a lowball registry of different coin...
It's not surprising that the median AU58 appears nicer than a MS60. The 58 grade was assigned on the basis of wear regardless of the number of...
Go to Heritage's website and look at recently sold MS62 early half eagles and see how ugly they are. Cal Link:...
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