Letter | Published:

Open Packing of Spheres

Nature volume 155, page 82 (20 January 1945) | Download Citation

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Abstract

SOME automatic and continuous coal-weighing apparatus make use of the experimental fact that graded-to-size coal weighs the same per unit volume whatever the size of the lumps; hence a cubic foot of large lump coal weighs the same as a cubic foot of small lump coal.

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  1. 9 Rotherwick Road, London, N.W.1.

    • A. S. E. ACKERMANN

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DOI

https://doi.org/10.1038/155082c0

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