Crystals
Found in 2 Collections and/or Records:
Astronomiae Physicae et Geometricae Elementa, 28 February 1698
Notes from a London meeting with Sir Isaac Newton on a revised plan for the Astronomiae physicae et geometricae elementa, (1702), Gregory's most important work. An erratum lies at the foot of this document, unrelated to it or to any of the other things on the sheet (which have their own entries in Gregory's index): a jotting about refraction, crystals, and cataracts of the eye. This is dated London, 30 May 1708.
Note about items received from Mor Dhughallach [Marion MacDougall], 15 August 1886
Note about items received from Mor Dhughallach [Mòr Dhùghallach or Marion MacDougall] which reads 'Got Celt from Mor Dhughallach Na h-Abhan auan Treisnish Mull Sunday 15 Aug[us[t 1886 also crystal cube.' [Haunn, Treisnis/Tresnish, Am Muile/Isle of Mull].