Explanatory notes
… of glue and gelatin or as fertilisers. The heading covers : (1) Bones and horn‑cores (inner bones of horns), … unworked or defatted (bones from which the fat has been removed by various processes). (2) Bones, simply prepared … acid , i.e., bones, the calcareous part of which has been dissolved by means of hydrochloric acid, and which, without …