- TitlePrinted ms copy of paper 'Age of the Earth' by John Perry with note 'not for publication' in Heaviside's writing, perhaps sent to Heaviside to abstract for the Journal of the Society of Telegraph Engineers 5 pp dated 14 October 1894.
- Reference005/I/3/07/06
- Persons keywordJohn Perry
- Conditions governing accessOpen access
- Level of descriptionItem
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