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Uploaded on:
13/02/2009 05:44:35
Type:
Digital Asset
File Size:
285.21 KB
Dimensions:
1000 x 723 pixels
2561 views 4 downloads
P number: P000157
Old photograph number: C03803
Caption: Sgurr Coire nan Gobhar, Loch Nevis, Knoydart. Inverness-shire. Opencast mica workings. Samples of mica books after rough dressing (rough cobbed) as sent for processing at the Pitlochry Depot. (Note 0.15 m. scale at base.)
Description: Sgurr Coire nan Gobhar, Loch Nevis, Knoydart. Inverness-shire. Opencast mica workings. Samples of mica books after rough dressing (rough cobbed) as sent for processing at the Pitlochry Depot. (Note 0.15 m. scale at base.) A photograph clearly illustrating the nature of the muscovite mica. Mica was used in industry in two forms; in a finely divided or pulverized form called 'ground mica' produced from mine waste or shop scrap, or sheet mica as in the photograph. The proportion of usable mica extracted is small, up to two per cent of the total rock excavated. A further 65-90 per cent is lost due to natural imperfections and damage to the 'books' during extraction.
Date taken: 01/01/1945
Photographer: Fisher, W.D.
Copyright statement: Crown
Acknowledgment: This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network
X longitude/easting: 179500
Y latitude/northing: 796500
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 285.21 KB; 1000 x 723 pixels; 85 x 61 mm (print at 300 DPI); 265 x 191 mm (screen at 96 DPI);
Average Rating: Not yet rated
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