Specimina ichnographica: or, a brief narrative of several new inventions, and experiments; particularly, The navigating of a ship in a calm, the improvement of the engine to raise water by fire, a new method of drying malt &c. For all which his Majesty has lately been most graciously pleas'd to grant his Letters Patent to John Allen, M.D / [John Allen].

Licence: Public Domain Mark

Credit: Specimina ichnographica: or, a brief narrative of several new inventions, and experiments; particularly, The navigating of a ship in a calm, the improvement of the engine to raise water by fire, a new method of drying malt &c. For all which his Majesty has lately been most graciously pleas'd to grant his Letters Patent to John Allen, M.D / [John Allen]. Source: Wellcome Collection.