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<p>[QUOTE=&quot;desertgem, post: 1800488, member: 15199&quot;]I would take a roll of jeffersons&nbsp; with the 50 gram reference wt. to a person who has a more precise calibrated scale and put the 50 gr weight and weigh it to be sure first, and then add new Jeffersons until it reached 100.00 gr. You can mix coins until you get a reasonable reference weight. Jewelers, pharmacists, High school/college science instructors, etc. The tolerances allowed coins do not individually allow them to be references. If it is a school, with multiple scales they may have a spare reference weight you could borrow and do it at home more leisurely.[/QUOTE]</p><p><br /></p>

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