Warren de la Rue Biography
Warren de la Rueastronomer, physicist
Birthplace: Guernsey, United Kingdom
After studying in Paris, he began working in his father's papermaking business, inventing an envelope-folding machine. He went on to invent the silver chloride battery, to do research on the discharge of electricity in gasses, and to invent the photoheliograph for use in celestial photography.Died: 4/19/1889
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