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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
Printed notice offering a gold medal 'To the author of the best essay on the natural history of cobalt'
Printed notice offering a gold medal 'To the author of the best essay on the natural history of cobalt'
Letter from Joseph Lowell about cobalt, with certificates
Letter from Joseph Lowell about cobalt, with certificates
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 Sam Howard about samples of cobalt which he has sent to the Society, also about copper
Letter from Sam Howard about samples of cobalt which he has sent to the Society, also about copper
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 the cobalt which he has discovered on an estate in Derbyshire
Letter from Sam Howard about the cobalt which he has discovered on an estate in Derbyshire
Letter from Harry Hart about cobalt
Letter from Harry Hart about cobalt
Letter from Harry Hart about cobalt
Letter from Harry Hart about cobalt
Letter to Harry Hart from Thomas Maydew & Co about cobalt
Letter to Harry Hart from Thomas Maydew & Co about cobalt
Letter to Harry Hart from Thomas Teague about cobalt
Letter to Harry Hart from Thomas Teague about cobalt
Letter to Harry Hart from James Pennington about cobalt
Letter to Harry Hart from James Pennington about cobalt
Letter from John Jacks about premiums for English cobalt
Letter from John Jacks about premiums for English cobalt
Letter from J Holdship about cobalt and finding a substitute for white lead
Letter from J Holdship about cobalt and finding a substitute for white lead
Letters from John Heaver about his discovery of cobalt (certificate signed by Josiah Wedgwood, Etruria, 4/4/1817)
Letters from John Heaver about his discovery of cobalt (certificate signed by Josiah Wedgwood, Etruria, 4/4/1817)
Letter from John Heaver about his claim to have discovered cobalt, also about Mr Hart, with certificates and envelope
Letter from John Heaver about his claim to have discovered cobalt, also about Mr Hart, with certificates and envelope
Letter from John Heaver about his discovery of cobalt
Letter from John Heaver about his discovery of cobalt
Account of experiments on cobalt by Michael Morris
Account of experiments on cobalt by Michael Morris
Letter from J Peat about cobalt and zinc
Letter from J Peat about cobalt and zinc
Letter in French from Jean Gottlieb Lehmann, Berlin about a premium about cobalt
Letter in French from Jean Gottlieb Lehmann, Berlin about a premium about cobalt