Carl Wilhelm Scheele
He independently discovered oxygen and identified several other chemical elements.
Quotes by Carl Wilhelm Scheele
The black powder of charcoal is not a simple element, but contains a volatile acid.
The air we breathe is a mixture of at least two different elastic fluids.
The 'fire air' (oxygen) is the most active part of the atmosphere, supporting both combustion and life.
The 'foul air' (nitrogen) is an inert gas that dilutes the 'fire air'.
The acid of prussic acid (hydrocyanic acid) is a deadly poison, yet it can be produced from common substances.
Tungsten contains a new metal, which I call 'tungsten' (heavy stone).
Molybdenum contains a new metal, distinct from lead and graphite.
The acid of uric acid is a unique substance found in animal excretions.
The acid of gallnuts (gallic acid) is a distinct substance, not merely a modified form of tannic acid.
The acid of apples (malic acid) is a unique organic acid.
The acid of lemons (citric acid) is a distinct substance, not merely a modified form of tartaric acid.
The acid of tartaric acid is a unique organic acid, not simply a modified form of vinegar.
The acid of phosphorus is a distinct substance, not merely a modified form of sulfuric acid.
The acid of fluorspar (hydrofluoric acid) is a powerful and dangerous substance that can etch glass.
The acid of arsenic is a distinct substance, not merely a modified form of sulfuric acid.
The acid of tungstic acid is a distinct substance, not merely a modified form of molybdic acid.
The acid of molybdic acid is a distinct substance, not merely a modified form of tungstic acid.
The acid of chlorine (hypochlorous acid) is a powerful bleaching agent.
The acid of barytes (barium sulfate) is a distinct substance, not merely a modified form of gypsum.
The acid of strontian (strontium sulfate) is a distinct substance, not merely a modified form of barytes.