Wow, I thought that schoolyard game died before I left 4th grade. What were the grades? Fat-est ( sticks on the others) , surface , smooth-rough,...
If any of you , or family member, use CANVAS as basis for taking or giving classes on-line, there is a ZOOM app within the Canvas program that...
I have never cleaned a french aluminum-bronze coin with acetone, but I can not see a chemical reason that a reaction would occur. If the coins...
It appears to be a lamination, I almost imagine I can see a small portion of letter imprint on the "flakeination". Jim
At one time 40+ years ago, I was a dedicated stamp collector, and then the US Postal Service began their junk production hoping to gather $$ from...
Why use water to rinse off acetone? If you use a high grade of acetone 99+% ( Lowe's gallon) or 100% ( Organic chem lab) let it evaporate while...
The whole coin tends to tone similarly, but the high points come on contact with flat surfaces and wear the toning off so they are lighter. If...
Here is the variety types and which are "no D" reverses http://www.lincolncentresource.com/1922Ddievarieties.html
I have been at it for "decades" and feel very good if I am within a point or two.. Years ago a "top 2" grader said he was trained to look at the...
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