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Letter from Thomas Ryder addressed to Lord Romney about arrowroot
Letter from Thomas Ryder addressed to Lord Romney about arrowroot
Letter from Mrs M Kendrick about experiment with starch
Letter from Mrs M Kendrick about experiment with starch
Letter from Samuel Toplis proposing a use for human manure with a sample of lake boiled with vegetable alkali
Letter from Samuel Toplis proposing a use for human manure with a sample of lake boiled with vegetable alkali
Letter to Harry Hart from Thomas Teague about cobalt
Letter to Harry Hart from Thomas Teague about cobalt
Letter from Joseph Lowell about cobalt, with certificates
Letter from Joseph Lowell about cobalt, with certificates
Letter from Dr Joseph Pellet on a substitute for iron bolts for ships
Letter from Dr Joseph Pellet on a substitute for iron bolts for ships
Letter from Robert Morgan to John Morgan about iron smelting at Carmarthen
Letter from Robert Morgan to John Morgan about iron smelting at Carmarthen
Letter from James Barr about scheme for mines
Letter from James Barr about scheme for mines
Letter to John Elsworth from the Society about his scheme for preserving ships bottoms
Letter to John Elsworth from the Society about his scheme for preserving ships bottoms
Letter from Mrs P Ensell about her imitation marble and other materials
Letter from Mrs P Ensell about her imitation marble and other materials
Letter from Charles Binns about fire proof starch
Letter from Charles Binns about fire proof starch
Letter from Messrs Ashton, Stocker and Doidge about black mineral substance, and certificate signed by Thomas Lewis
Letter from Messrs Ashton, Stocker and Doidge about black mineral substance, and certificate signed by Thomas Lewis
Letter from Joseph Hume about Messrs Ashton, Stocker and Doidge's newly discovered black mineral substance
Letter from Joseph Hume about Messrs Ashton, Stocker and Doidge's newly discovered black mineral substance
Letter from James Wallis about his portable food, as a temporary supply in the event of an army running short
Letter from James Wallis about his portable food, as a temporary supply in the event of an army running short
Letter from H Browne about manure made from coal tar
Letter from H Browne about manure made from coal tar
Letter from Rear Admiral Archibald Duff about his proposal for the prevention of fire damp explosions in mines
Letter from Rear Admiral Archibald Duff about his proposal for the prevention of fire damp explosions in mines
Letter from John Crane about his safety lamp for use in mines
Letter from John Crane about his safety lamp for use in mines
Letter from Joseph Cottle about his improved varnish
Letter from Joseph Cottle about his improved varnish
Letter from William Smith about his 'fine and lasting green' colour for artists and his dye
Letter from William Smith about his 'fine and lasting green' colour for artists and his dye
Letter from 'MB' about method of sweetening privies
Letter from 'MB' about method of sweetening privies