ICL Boulby chief geologist Thomas Edwards said most gritters in the north of England will ... beneath the sea”. Fifty years of digging for potash, rock salt and now polyhylite has left more ...

There’s table salt, Kosher salt, sea salt, and Himalayan salt—just to name a few. But while all these salts contain sodium, only one—table salt—has been fortified with iodine, an essential ...

M. Margneritte, of Paris, well-known as a distinguished chemist, has discovered a valuable mode of purifying rock and sea salt. The latter is, for the most part, delivered for consumption in such ...