PLATE I.
[Illustration: FIG. 9.--DE BEERS MINE, 1874.]
[Illustration: FIG. 10.--KIMBERLEY MINE, 1874.]
[Illustration: FIG. 11.--DE BEERS MINE, 1873. (From photographs by C.
Evans.)]
Encyclopaedia Britannica, 11th Edition, "Diameter" to "Dinarchus" Volume 8, Slice 4 · 第 6 / 86 题