| Germany's chief natural resources are iron ore, bituminous coal and lignite, potash, timber, lignite, natural gas, salt, and nickel. |
| It could also be treated by rubbing salt, brain or potash alum into the surface to produce a very pale leather. |
| The leachate was collected and then chemically converted to true saltpeter, potassium nitrate, by mixing it with a solution of potash. |
| The first experiments with the caustic potash purification had been conducted in glass retorts, but they were less successful when scaled up. |
| And it provided vital information on lime requirement, phosphorus, potash, magnesium, copper, manganese and zinc. |
| Glauber created a mixture of saltpeter, lime, phosphoric acid, nitrogen and potash which was the first completely mineral fertilizer. |
