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Many of Edison's major inventions are touched on

Joseph Priestley: Pioneer Chemist (Immortals of Science) by Rebecca B. Marcus Hope is a Thing with Feathers It's no wonder why we'veJoseph Priestley is known as the "father of pneumatic chemistry," because of his pioneer work with gases. The methods he invented of collecting and testing gases enabled later chemists to carry on where he left off. His greatest discovery was the preparation of oxygen from mercuric oxide, in 1774. He is credited with having discovered a number of other gases, among them hydrogen chloride, ammonia, and carbon monoxide. Priestley's formal training was