Translation of a letter in French from Jean Gottlieb Lehmann, Berlin about cobalt

• RSA/PR/GE/110/6/109
• Item
• 4/8/1757

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)

Notes on cobalt, zaffre and smalt

• RSA/PR/GE/110/2/97
• Item
• 1756

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)

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 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 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 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 in French from M Hellot about cobalt

• RSA/PR/GE/110/5/73
• Item
• 11/1/1757

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

Letter in French from Jean Gottlieb Lehmann, Berlin about cobalt

• RSA/PR/GE/110/6/108
• Item
• 4/8/1757

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

Letter in French from Jean Gottlieb Lehmann, Berlin about a premium about cobalt

• RSA/PR/GE/110/8/100
• Item
• 8/2/1760

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

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)

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)

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 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 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 Rev M Wingate Pullen about cobalt

• RSA/PR/GE/110/1/13
• Item
• 1/2/1755

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

Letter from Nicholas Crisp about cobalt

• RSA/PR/GE/110/1/20
• Item
• 14/5/1755

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

Letter from Michael Clarke about cobalt

• RSA/PR/GE/110/1/21
• Item
• 14/5/1755

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