bone earth

How to use bone earth in a sentence

• When we get old, they contain so much bone-earth that they become more brittle, and often break very easily.

  First Book in Physiology and Hygiene | J.H. Kellogg

• When we are young, the bones have less of this bone-earth, and so they bend easily, and readily get out of shape.

  First Book in Physiology and Hygiene | J.H. Kellogg

• The soil called bone-earth is, in fact, found under the crystalline bed which covers the ground of the caverns.

  Primitive Man | Louis Figuier

• To these facts may be added the presence of thick beds and veins of iron ore and of apatite or calcium phosphate (bone earth).

  The Chain of Life in Geological Time | Sir J. William Dawson