Explanatory notes
… turtles, etc. (including fats obtained from bone, marrow or waste of these animals). (2) Neat’s‑foot and similar oils … in air, chiefly used as lubricants for delicate mechanisms (watches, sewing‑machines, fire‑arms, etc.). (3) Bone oil … bone fat by pressure, or by the treatment of bones with hot water. This is an odourless, yellowish liquid oil, which …