when was the first photograph taken in america
History of photography
Herbert Bowyer Berkeley experimented with his own version of collodion emulsions after Samman introduced the idea of adding dithionite to the pyrogallol developer . Berkeley discovered that with his own addition of sulfite , to absorb the sulfur dioxide given off by the chemical dithionite in the developer , that dithionite was not required in the developing process . In 1881 he published his discovery . Berkeley 's formula contained pyrogallol , sulfite and citric acid . Ammonia was added just before use to make the formula alkaline . The new formula was sold by the Platinotype Company in London as Sulpho - Pyrogallol Developer .
Herbert Bowyer Berkeley experimented with his own version of collodion emulsions after Samman introduced the idea of adding dithionite to the pyrogallol developer . Berkeley discovered that with his own addition of sulfite , to absorb the sulfur dioxide given off by the chemical dithionite in the developer , that dithionite was not required in the developing process . In 1881 he published his discovery . Berkeley 's formula contained pyrogallol , sulfite and citric acid . Ammonia was added just before use to make the formula alkaline . The new formula was sold by the Platinotype Company in London as Sulpho - Pyrogallol Developer .