Amethyst under polarized light Product:Greetings card circa 1953

circa 1953

Hygiene was gradually being recognised as essential in managing the health of the nation

A swarm of English bees hiving in the Imperial carriage

and the new nomenclature of DUMAS

usually for civil prisoners such as debtors

Amethyst under polarized light Product:Greetings card circa 1953Sixteen figures showing specimens of amethysts viewed under polarized light and exhibiting veined structures. Brewster notes in his text: 'The observations are the result of an immense variety of experiments, which accidental circumstances put it in my power to make upon this interesting mineral. Having access to whole bagfuls of amethystine pyramids from the Brazils, in the possession of Mr Alexander, lapidary in Edinburgh, I have examined some