Glasdir Mine
A copper mine near Dolgellau, which also produced some silver and gold.
From c.1852 the site was worked as opencast and later it was worked as a mine. William Elmore first applied the principle of oil flotation here, and he purchased the plant in 1896. Parts of the flotation plant have been preserved by Snowdonia National Park, and there are also remains of the terraced processing floors of the main mine building.[1]
Glasdir closed in 1915. The recorded output of precious metals between 1872-1915 was 8,275 ounces of silver (1913-14)and 735 ounces of gold (1914). 13,077 tons of dressed copper ore left the mine between 1872 - 1913.[2]
Another source refers to Alexander Stanley Elmore and Francis Edward Elmore in connection with mineral separation.[3]