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<p>[QUOTE=&quot;Fallguy, post: 3359500, member: 84739&quot;]All, without commenting on the use of coinage weight for any purpose, e.g. counterfeiting, et al, I believe the data gleaned from the Report of the Secretary of the Treasury on the State of the Finances - 1902 regarding the loss of weight over time of silver coinage, is fairly conclusive: Abrasion does cause loss of mass over time and smaller coins suffer a greater loss (by percent of original mass) than do larger coins. The findings displayed below are derived from that Report. BTW, for what it&#039;s worth (and assuming my interpretation of the output is correct; an assumption that is always suspect) the ANOVA and t-tests on these data indicated that the loss of mass (over time) effect was not random (due to &quot;chance&quot;), both within and between groups.</p><p><br /></p><p>Semper Fidelis[/QUOTE]</p><p><br /></p>

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