DSAE test file

grease table, noun phrase

Origin:
See quotation 1931.
Diamond-mining
A sorting device in which a greased surface is used to retain the diamonds. See also sorting table (sorting sense 1 b).
1931 G. Beet Grand Old Days 99After a process of jigging, the final concentrates are made to pass over shaking grease-tables to which the diamonds adhere, while the other minerals are automatically washed away, the separation being based on the well-known affinity of the diamond for grease (petroleum jelly).
1990 B. Steyn in S. Afr. Panorama Jan.Feb. 71 (caption)The grease tables where the final recovery of the precious gems takes place.
A sorting device in which a greased surface is used to retain the diamonds.

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19311990