Letter from Thomas Turner requesting the loan of a manuscript about cobalt, belonging to the Society

• RSA/PR/MC/105/10/177
• Item
• 22/2/1791

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letters from J Sowell on Mr Hart's claim for the discovery of cobalt

• RSA/PR/MC/105/10/282
• Item
• 11/6/1817

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from J Holdship about cobalt and finding a substitute for white lead

• RSA/PR/MC/105/10/435
• Item
• 26/2/1789

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter to Harry Hart from Thomas Teague about cobalt

• RSA/PR/MC/105/10/511
• Item
• 20/12/1816

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter to Harry Hart from James Pennington about cobalt

• RSA/PR/MC/105/10/510
• Item
• 1/5/1812

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from Joseph Lowell about cobalt, with certificates

• RSA/PR/MC/105/10/515
• Item
• 12/5/1817

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter to Harry Hart from Thomas Maydew & Co about cobalt

• RSA/PR/MC/105/10/512
• Item
• 24/2/1817

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from Harry Hart about cobalt

• RSA/PR/MC/105/10/513
• Item
• 5/3/1817

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from James Dean about Mr Hart's claim for the discovery of cobalt

• RSA/PR/MC/105/10/516
• Item
• 26/6/1817

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from Harry Hart about cobalt

• RSA/PR/MC/105/10/514
• Item
• 5/6/1817

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from John Heaver about his claim to have discovered cobalt, also about Mr Hart, with certificates and envelope

• RSA/PR/MC/105/10/529
• Item
• 27/3/1817

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letters from John Heaver about his discovery of cobalt (certificate signed by Josiah Wedgwood, Etruria, 4/4/1817)

• RSA/PR/MC/105/10/527
• Item
• 20/4/1817

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from John Heaver about his discovery of cobalt

• RSA/PR/MC/105/10/528
• Item
• 22/3/1817

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from John Jacks about premiums for English cobalt

• RSA/PR/MC/105/10/573
• Item
• 16/3/1809

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from Sam Howard about the cobalt which he has discovered on an estate in Derbyshire

• RSA/PR/MC/105/10/611
• Item
• 3/11/1806

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from Sam Howard about the cobalt from Derbyshire and one in Devonshire and lead and copper

• RSA/PR/MC/105/10/612
• Item
• 9/5/1807

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from Sam Howard about his discovery of cobalt and also about the sample he has sent to the Society of Carmine

• RSA/PR/MC/105/10/614
• Item
• 5/6/1807

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from Sam Howard about samples of cobalt which he has sent to the Society, also about copper

• RSA/PR/MC/105/10/613
• Item
• 18/5/1807

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Letter from Sam Howard about the ore in the mines and also about his cobalt discovery

• RSA/PR/MC/105/10/615
• Item
• 20/7/1807

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)

Printed notice offering a gold medal 'To the author of the best essay on the natural history of cobalt'

• RSA/PR/MC/105/10/625
• Item
• 19/5/1756

Part of Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA)