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Uploaded on:
13/02/2009 05:45:48
Type:
Digital Asset
File Size:
118.25 KB
Dimensions:
1000 x 739 pixels
2328 views 4 downloads
P number: P000164
Old photograph number: C03812
Caption: Processing of Scottish mica. Pitlochry Depot (January 1945). Perthshire. Selecting sheets for grade and quality at the Sorting Factory.
Description: Processing of Scottish mica. Pitlochry Depot (January 1945). Perthshire. Selecting sheets for grade and quality at the Sorting Factory. The photograph shows a worker standing at her desk sorting the cut and trimmed mica into piles of different grade and quality. The grade is determined not by the area of the plate but by the largest rectangle that can be obtained from it. The grader may remove some stained films etc. to improve the quality. Unlike most metallic minerals mica is not subject to any process of treatment or concentration whereby its quality can be improved. Quality is an intrinsic character which cannot be altered except in so far as skilful cutting may raise the value by eliminating imperfections.
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: 294500
Y latitude/northing: 758500
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 118.25 KB; 1000 x 739 pixels; 85 x 63 mm (print at 300 DPI); 265 x 196 mm (screen at 96 DPI);
Average Rating: Not yet rated
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