Abstract
IN a recent communication on the internal surface of coal1, Dryden has directed attention to the interesting agreement between (a) the minimum particle-size observed by Nagelschmidt and Cart-wright2 in electron micrographs of films deposited from dilute ethylenediamine extracts from coal, (b) particle-sizes observed in the ultramicroscopic examination of similar extracts3, and (c) the order of particle-size concerned in the model of colloidal structure of coal suggested by Bangham et al.4.
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References
Dryden, I. G. C., Nature, 169, 269 (1952).
Nagelschmidt, G., and Cartwright, W. J., Nature, 169, 270 (1952).
Kann, L., Fuel, 30, 47 (1951).
Bangham, D. H., et al., Fuel, 28, 231 (1949).
Shaw, F., and Blayden, H. E. (to be published).
Thiessen, P. A., et al., Z. phys. Chem., 156, 447 (1931); 165, 453 (1933); 176, 397 (1936).
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BOULT, E., THIRSK, H. & BLAYDEN, H. Nature of the Solution obtained by Pyridine Extraction of Coal. Nature 170, 317–318 (1952). https://doi.org/10.1038/170317b0
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DOI: https://doi.org/10.1038/170317b0
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