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Letter from Dr J C Lettsom about perpetual motion
Letter from Dr J C Lettsom about perpetual motion
Letter from Richard Forbes about his carriage
Letter from Richard Forbes about his carriage
Letter from A Smith about his method of calculating a standard inch
Letter from A Smith about his method of calculating a standard inch
Letter from John Simpson about his ventilator and other mechanical improvements
Letter from John Simpson about his ventilator and other mechanical improvements
Letter from William Mitchel about his father's paper on raising water by rarifying and condensing the air
Letter from William Mitchel about his father's paper on raising water by rarifying and condensing the air
Letter in French from Mesnil de Lepinay about magnetic attraction
Letter in French from Mesnil de Lepinay about magnetic attraction
Letter in French from Mesnil de Lepinay about magnetic attraction
Letter in French from Mesnil de Lepinay about magnetic attraction
Letter from Thomas Greenstreet containing a description of an improved head for gun or hand harpoon
Letter from Thomas Greenstreet containing a description of an improved head for gun or hand harpoon
Letter from John McLiesh about ways of working the great guns
Letter from John McLiesh about ways of working the great guns
Letter from M W Pycock about his carriage 'to travel without horses', with a note of the Society's decision
Letter from M W Pycock about his carriage 'to travel without horses', with a note of the Society's decision
Letter from Lewis Bayne about his steam boat and printed advertisements copied from the Edinburgh Newspapers
Letter from Lewis Bayne about his steam boat and printed advertisements copied from the Edinburgh Newspapers
Letter from Charles Durand about his machine for pumping mines and other purposes, with a printed notice, in French
Letter from Charles Durand about his machine for pumping mines and other purposes, with a printed notice, in French
Letter from Thomas Wilson about his improved coach, enclosed in a letter to him from James Ferguson on behalf of Earl Stanhope
Letter from Thomas Wilson about his improved coach, enclosed in a letter to him from James Ferguson on behalf of Earl Stanhope
Letter from William Druthin about a national monument in honour of the victories of Trafalgar and Waterloo
Letter from William Druthin about a national monument in honour of the victories of Trafalgar and Waterloo
Letter from John Brown jnr about steering wheel for ships
Letter from John Brown jnr about steering wheel for ships
Letter from William K Northall about 'palimpseston' - a substitute for childrens' slate
Letter from William K Northall about 'palimpseston' - a substitute for childrens' slate
Letter from John Robinson about his improved cart
Letter from John Robinson about his improved cart
Letter from Benjamin Probert about his dipping needle to find out longitude
Letter from Benjamin Probert about his dipping needle to find out longitude
Letter from O Essex about his improved compass
Letter from O Essex about his improved compass
Letter from Colin MacKenzie about hanging large bells
Letter from Colin MacKenzie about hanging large bells