Letter from John Mooring about cobalt, specimen sent from Plymouth

• RSA/PR/GE/110/1/8
• Item
• 15/11/1754

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

Letter from Dr Linden about cobalt mines in parts of Wales

• RSA/PR/GE/110/1/12
• Item
• 10/1/1755

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

Letter from Dr Lewis about cobalt

• RSA/PR/GE/110/1/15
• Item
• 8/4/1755

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

Extract of letter from Peter Ornskold about cobalt and bismuth ore

• RSA/PR/GE/110/2/122
• Item
• 20/8/1755

Parte de 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

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

Letter from Francis Beauchamp about his mine of cobalt

• RSA/PR/GE/110/6/91
• Item
• 16/5/1757

Parte de 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

Parte de 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

Parte de 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

Parte de 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

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

Letter from J Peat about cobalt and zinc

• RSA/PR/GE/110/13/38
• Item
• 3/11/1762

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

Letter from Francis Beauchamp about cobalt samples

• RSA/PR/GE/110/1/28
• Item
• 23/6/1755

Parte de 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

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

Letter from D W Linden about cobalt

• RSA/PR/GE/110/5/5
• Item
• 22/10/1754

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

Letter from George Best about cobalt

• RSA/PR/GE/110/5/7
• Item
• 28/11/1754

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

Letter from D W Linden about cobalt

• RSA/PR/GE/110/5/9
• Item
• 2/12/1754

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

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

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

Parte de 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

Parte de 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

Parte de 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

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