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Paris SalpetriereThe manufactory of saltpeter (potassium nitrate) used to make gunpowder : in the 19th century it will become one of Pariss leading hospitals, associated with Charcot etc
A Photographic Positive 1853A mother seeks assistance in regards to her daughter accidentally spilling photographic chemicals, in particular staining her face from nitrate of silver
Elkingtons Electro-plate Factory, Birmingham 1844The silver deposit room at Elkingtons Electro-plate Factory, Birmingham. The objects to be plated are connected to an electrical cable (routed across the ceiling)
Method of refining saltpeter for making gunpowderMethod of refining saltpeter (potassium nitrate) for making gunpowder. circa 18th century
Leopold GmelinLEOPOLD GMELIN German chemist at Heidelberg who discovered potassium ferricyanide, henceforth known as Gmelins Salt : author of standard chemistry textbook Date: 1788 - 1853
Gobbinsite comprises of (hydrated sodium potassium calcium aluminum silicate) and derives from the zeolite group. Specimen found nr. Black Cave, Island Magee, Co. Antrim
Orthoclase (potassium aluminum silicate) is a major granite forming mineral. Specimen from Brevik, Norway
MuscoviteA specimen of muscovite (Potassium aluminum silicate hydroxide fluoride) with hematite and limonite inclusions, from Adelaide Australia
Staining FloorboardsUsing a brush to stain floorboards with permanganate of potash (potassium permanganate). Date: 1930s