View Catalog: MINT00175
| Catalog Name | MINT00175 | |
|---|---|---|
| Document | ||
| Title | Holograph queries about standards of trial plates | |
| Subtitle | ||
| Author | Isaac Newton | |
| Place of Origin | no place assigned | |
| Origin Date | After 21 August 1710 | |
| Repository | National Archives (Kew, Richmond) | |
| Pages | 307 | |
| Wordcount | 0 | |
| Language |
Contents
Notes
Refiners have recently found ways of refining gold and silver to above 24 carats and 12 ounces respectively, which can result in over-refined trial plates making perfectly good coinage appear sub-standard.
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