Analysis of information sources in references of the Wikipedia article "Argyrol" in English language version.
He and a brilliant young German student, Hermann Hille, worked out the formula for Argyrol, a mild silver protein solution for which doctors had many uses—to treat gonorrhoea, including gonorrheal blindness, relieve severe nasal congestion.... In 1928, with superb timing, Barnes sold out Argyrol for an estimated $4,000,000.
He and a brilliant young German student, Hermann Hille, worked out the formula for Argyrol, a mild silver protein solution for which doctors had many uses—to treat gonorrhoea, including gonorrheal blindness, relieve severe nasal congestion.... In 1928, with superb timing, Barnes sold out Argyrol for an estimated $4,000,000.