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Letter from William Billingsley about perpetual motion machine
Letter from William Billingsley about perpetual motion machine
Letter from Pietro Sladwick about his perpetual motion machine
Letter from Pietro Sladwick about his perpetual motion machine
Letter from Robert Dawson to Sir Joseph Banks about his improved plough and his mastery of perpetual motion
Letter from Robert Dawson to Sir Joseph Banks about his improved plough and his mastery of perpetual motion
Letter from Samuel Peel about perpetual motion
Letter from Samuel Peel about perpetual motion
Letter from Robert Dawson about his use of perpetual motion
Letter from Robert Dawson about his use of perpetual motion
Letter from an engineer about perpetual motion machine
Letter from an engineer about perpetual motion machine
Letter from Thomas Samoth about perpetual motion
Letter from Thomas Samoth about perpetual motion
Letter from Samuel Evans about perpetual motion
Letter from Samuel Evans about perpetual motion
Letter in French signed 'un gros suisse' about perpetual motion
Letter in French signed 'un gros suisse' about perpetual motion
Letter in French signed 'un gros suisse' about perpetual motion
Letter in French signed 'un gros suisse' about perpetual motion
Letter from Francis Dubourdier about his method of obtaining perpetual motion
Letter from Francis Dubourdier about his method of obtaining perpetual motion
Letter from J W Barnard about perpetual motion
Letter from J W Barnard about perpetual motion
Letter from Joseph Driver about perpetual motion,with a note of the Society's decision
Letter from Joseph Driver about perpetual motion,with a note of the Society's decision
Letter from Private James Anderson about perpetual motion
Letter from Private James Anderson about perpetual motion
Letter from Samuel Evans about perpetual motion
Letter from Samuel Evans about perpetual motion
Letter from Samuel Evans about perpetual motion
Letter from Samuel Evans about perpetual motion
Letter in French from Amorvet about perpetual motion
Letter in French from Amorvet about perpetual motion
Letter from De Manger in French on perpetual motion
Letter from De Manger in French on perpetual motion
Letter from Johann Ludwig in German about his discovery of perpetual motion
Letter from Johann Ludwig in German about his discovery of perpetual motion
Letter from John Lewis Tesch about his machine of perpetual motion
Letter from John Lewis Tesch about his machine of perpetual motion