ETrac US coin numbers better pee first, it's long:smoke:

[jbow]

Some large cents were 100% copper and more modern cents are bronze and new ones are zinc right? Maybe the large cent in question is a different metal... what would pure copper read?


http://www.coincommunity.com/coin_histories/cent_1839_coronet_head.asp As early as 1850, the Mint gave serious thought to replacing the large cents with a smaller coin. In 1857, officials selected an alloy of 12% nickel and 88% copper for the new 19-millimeter Flying Eagle cents.

By 1814, U.S. copper coinage had also become a casualty of the war. For more than twenty years the Mint had purchased blank, copper planchets from the English manufacturer, Boulton & Watt of Liverpool. Early in the war supplies stopped, and by 1814 the last of the imported copper blanks had been turned into cents of the "Classic Head" design. Although no copper planchets were available for coinage in 1815, this idle year proved useful, as it allowed a new obverse design to be engraved for cents and marked the beginning of a new era of mechanization and uniformity

I don't know... would this make a difference?

J

 

[Erik in NJ]

n/t

 

[digitrich]

but all the tones would be the same, which would make separating, and differentiating ferrous 12 trash (such as pull tabs) and coins quite a bit more difficult and much easier if you had different tones for each to help. In 4 tone ferrous all ferrous 12 targets use the same tone.

 

[jbow]

I wonder if they will still register with a 1-* if they are in the ground on edge. The ground may well make a difference to the 'on edge" ID difference..

Very in ter est ing.

J

 

[digitrich]

I am really wondering if that's why I can't pick up REAL small lead, if the ETrac is looking at it like mineralization?

 

[jimpugh]

From half the depth gauge to off the screen.....

ht
jim

 

[digitrich]

n/t

 

[Erik in NJ]

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[digitrich]

I am more concerned with pinning down coins before crops are cut here. I will try a couple for you though.

 

[jbow]

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[digitrich]

I honestly think ML physically moved around the ID's to lay out the coins in a way that one could have the best shot at IDing them prior to digging, and putting them mostly on the same conduct line might have overcrowded them to a point that they moved the large cent to that position. And it is also beginning to look like larger mass or size effects the ID as well, which might explain on edge different results. I don't know.

 

[digitrich]

n/t

 

[jbow]

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