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Published online by Cambridge University Press: 01 July 2024
The author regrets that in the photograph section on p. 50 the caption to the “top” Fig. 2 should read:
Fig. 2(b). Rock sample of attapulgite from Yucatan, Mexico (Tertiary).
the caption on the “bottom” Fig. 2 should read:
Fig. 2(a). Spray-dried attapulgite from Yucatan, Mexico.
Also the bar scales on Fig. 9 were inadvertently juxtapositioned:
Fig. 9(a) should carry the 10 μL scale, and Fig. 9(b) the 1 μ scale.
The online version of the original article can be found under https://doi.org/10.1346/CCMN.1971.0190105
B. F. Bohor and R. E. Hughes: Scanning electron microscopy of clays and clay minerals. Clays and Clay Minerals19, 49–54 (1971). https://doi.org/10.1007/s42860-020-00063-z.