"Native sulphur" Quotes from Famous Books
 ... get used to them," said the young inventor, with a smile. "Perhaps it will be easier if I say that sometimes selenium is found in native sulphur. Selenium is usually obtained from the flue-dust or chamber deposits of some factory where sulphuric acid is made. They take this dust and treat it with acids until they get the pure selenium. Sometimes selenium comes in crystal forms, and again it is combined ...
— Tom Swift and his Photo Telephone • Victor Appleton
... you get used to them," said the young inventor, with a smile. "Perhaps it will be easier if I say that sometimes selenium is found in native sulphur. Selenium is usually obtained from the flue-dust or chamber deposits of some factory where sulphuric acid is made. They take this dust and treat it with acids until they get the pure selenium. Sometimes selenium comes in crystal forms, and again it is combined ...
— Tom Swift and his Photo Telephone • Victor Appleton
... Native sulphur was seen amongst the inhabitants of the island; but I had no opportunity of learning where they got it. We found also ochre, a stone that gives a purple colour, and another that gives a very good green. It may be doubted, whether this last is known. In its natural state, ...
— A General History and Collection of Voyages and Travels, Volume 16 • Robert Kerr |
