| 单词 | bone earth |
| 释义 | > as lemmasbone earth bone earth n. now rare = bone ash n. ΘΚΠ the world > matter > properties of materials > temperature > heat > burning > products of burning > [noun] > ashes or cinders > specific ashes soap-ashes?1520 gravelled ashes1579 bone ash1594 cupel-dusta1626 polverine1662 peat ash1669 kelp1679 clar1683 cupel-ashes1683 wood-ash1748 bone earth1770 kelp-ashes1834 white ash1837 weed ash1841 fly ash1931 1770 Compend Physics 13 (heading) Bone-Earth. 1851 Fraser's Mag. Feb. 246/2 They have a cheap substitute in superphosphate of lime, a soluble form of bone-earth. 1885 A. H. Church Eng. Porcelain iii. 29 There can be no difficulty in identifying the earth produced by the calcination of certain animal and vegetable matters with bone-earth, that is, calcined bones which consist mainly of phosphate of lime. 1938 W. Seifriz Physiol. Plants iii. 30 As for the other three fertilizers.., phosphoric acid, potash, and nitrates, the first may be added as phosphate, prepared from phosphate-containing minerals or from bones, the ‘bone earth’ of which yields superphosphate. < as lemmas |
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