NGT24-1/2-10
1945
Notiser - Notes. A method of counting out petrofabric diagrams.
24
1, 2
112-113

The counting out petrofabric diagrams as described in the literature is carried out by means of a celluloid counter with circular holes representing 1, 1,5 or 2 per cent of the area of the circle of projection. The present writer has found it more convenient to construct a net of circles with the percentage wanted, with the distance between the centres equal to the radius of the circles.

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