Explanatory notes
… either by refining residues of lead, copper, etc., or by extraction from the sulphide or carbonate ores (e.g., … with a reddish tint, brittle, difficult to work and a bad conductor. It is used in scientific apparatus and in the … may fall in the heading in accordance with Note 5 to Section XV : (1) Bismuth‑lead‑tin alloys (sometimes with …