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Letter from Harry Hart about cobalt
Letter from Harry Hart about cobalt
Letter from John Jacks about premiums for English cobalt
Letter from John Jacks about premiums for English cobalt
Letter from Sam Howard about the cobalt from Derbyshire and one in Devonshire and lead and copper
Letter from Sam Howard about the cobalt from Derbyshire and one in Devonshire and lead and copper
Letter from Sam Howard about his discovery of cobalt and also about the sample he has sent to the Society of Carmine
Letter from Sam Howard about his discovery of cobalt and also about the sample he has sent to the Society of Carmine
Letter from Gustavus Brander about cobalt
Letter from Gustavus Brander about cobalt
Letter from John Mooring about cobalt
Letter from John Mooring about cobalt
Letter from Francis Beauchamp about cobalt
Letter from Francis Beauchamp about cobalt
Letter from Rev M Wingate Pullen about cobalt
Letter from Rev M Wingate Pullen about cobalt
Letter from Nicholas Crisp about cobalt
Letter from Nicholas Crisp about cobalt
Letter from Michael Clarke about cobalt
Letter from Michael Clarke about cobalt
Letter from Francis Beauchamp about cobalt
Letter from Francis Beauchamp about cobalt
Letter from Francis Beauchamp about specimens of cobalt, copper ores and mandicks
Letter from Francis Beauchamp about specimens of cobalt, copper ores and mandicks
Letter from Dr Linden about cobalt
Letter from Dr Linden about cobalt
Abstract of treatise on cobalt
Abstract of treatise on cobalt
Letter from D W Linden about cobalt
Letter from D W Linden about cobalt
Letter in French from Jean Gottlieb Lehmann, Berlin about cobalt
Letter in French from Jean Gottlieb Lehmann, Berlin about cobalt
Account of experiments on cobalt by Michael Morris
Account of experiments on cobalt by Michael Morris
Letters from J Sowell on Mr Hart's claim for the discovery of cobalt
Letters from J Sowell on Mr Hart's claim for the discovery of cobalt
Letter to Harry Hart from James Pennington about cobalt
Letter to Harry Hart from James Pennington about cobalt
Letter from James Dean about Mr Hart's claim for the discovery of cobalt
Letter from James Dean about Mr Hart's claim for the discovery of cobalt