Item #: M980.0045.011
A bottle of crystal pyro, a white powdery crystal made by superheating gallic acid. Pyrogallic acid, popularly known as pyro, is a chemical used for developing photographic negatives. It was used throughout the 1900s. Crystal pyro fell out of general use around 1920.
- From the collection of J. Gordon Henderson, a photographer in Goderich from 1930 to 1980.
- J. Gordon Henderson bought his business from J. W. Trussler. The business was previously owned by J. T. Fell and Fred Brophey.