Miners once lived and worked in Humberstone saltpeter works. Now it's a ghost town and UNESCO World Heritage Site. Photos ...

But we believe that the nitrogenous element is really a valuable ingredient in fertilizers, for nitrate of soda, NaO, NOS is known to be a valuable fertilizer, and where found in natural beds as ...

CHEMICAL processes, induced by ultraviolet light in some aqueous inorganic nitrates, are of substantial interest in the chemistry of atmospheric aerosols. Nitrates form a large fraction of the ...