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Uploaded on:
14/02/2009 03:35:15
Type:
Digital Asset
File Size:
220.09 KB
Dimensions:
756 x 1000 pixels
3352 views 5 downloads
P number: P002455
Old photograph number: C03094
Caption: Drumchapel, near Glasgow. Gravitational survey by Eotvos Torsion Balance of part of pre-glacial valley of River Kelvin. Removal of the balance from a field station.
Description: Drumchapel, near Glasgow. Gravitational survey by Eotvos Torsion Balance of part of pre-glacial valley of River Kelvin. Removal of the balance from a field station. The balance is clamped fast to inside of tent. The trolley is erected against south side of tent (white line at base indicates magnetic south of the station point) and strapped. Note long flap of waterproof cover opposite tent door. A Eotvos Torsion Balance is a geophysical prospecting instrument that is used to determine distortions in the gravitational field, i.e. to detect local anomalies in the earth's gravitational field. These anomalies ARE due to concealed features, in this case undulations in the rock strata under a varying thickness of superficIal glacial deposits.
Date taken: 01/01/1926
Photographer: Manson, W.
Copyright statement: Crown
Acknowledgment: This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network
X longitude/easting: 252500
Y latitude/northing: 670500
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Portrait
Size: 220.09 KB; 756 x 1000 pixels; 64 x 85 mm (print at 300 DPI); 200 x 265 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Best of BGS Images/ Images from the archives  

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