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Letter from Matthias Saul about his sliding sashes for windows, with drawing
Letter from Matthias Saul about his sliding sashes for windows, with drawing
Letter from Johannes Poske in German, description about preventing a ship from sinking, with drawing
Letter from Johannes Poske in German, description about preventing a ship from sinking, with drawing
Letter from Charles Bellamy with drawing of handmill
Letter from Charles Bellamy with drawing of handmill
Letter from N Beardmore about railway points
Letter from N Beardmore about railway points
Letter from Thomas Hunt about his rowing barges
Letter from Thomas Hunt about his rowing barges
Letter from Thomas Hunt, draft of prospectus for subscriptions towards the development of his rowing barges
Letter from Thomas Hunt, draft of prospectus for subscriptions towards the development of his rowing barges
Letter from William Walton claiming premium for stopping breaches in banks
Letter from William Walton claiming premium for stopping breaches in banks
Letter from Samuel Steernson, estimate for building a house for experiment with a fire extinguisher
Letter from Samuel Steernson, estimate for building a house for experiment with a fire extinguisher
Letter from Henry Badger agreeing to build a house for experiment with fire extinguisher
Letter from Henry Badger agreeing to build a house for experiment with fire extinguisher
Letter from James Simpson about Mr Marshall's 'intenaco'
Letter from James Simpson about Mr Marshall's 'intenaco'
Letter from J E McDonall about his machine
Letter from J E McDonall about his machine
Letter from G Thurnell about a water meter
Letter from G Thurnell about a water meter
Letter from James Mather about ventilation
Letter from James Mather about ventilation
Letter from James Mather about ventilation
Letter from James Mather about ventilation
Letter from James Mather about ventilation
Letter from James Mather about ventilation
Letter from Benjamin Rotch about Mr Fillary's plummer block
Letter from Benjamin Rotch about Mr Fillary's plummer block
Letter from Robert Hughes about his bridge tree for mills, with a note of the Society's decision
Letter from Robert Hughes about his bridge tree for mills, with a note of the Society's decision
Letter from Matthew Groves, clock maker about his new watch escapement, with a note of the Society's decision
Letter from Matthew Groves, clock maker about his new watch escapement, with a note of the Society's decision
Letter from Henry Thompson about his burglar and fire alarm
Letter from Henry Thompson about his burglar and fire alarm
Letter from Dixon Vallance about his self moving machine with diagram
Letter from Dixon Vallance about his self moving machine with diagram