Letter from Erasmus Darwin to James Watt, 1794/09/01 [p1], Darwin writes to Watt concerning their experiments into the use of gases in medicine. Darwin also mention Thomas Wedgwood, the son of Josiah, and h...

Thomas Wedgwood: the Godfather of Photography, Image: The Alchymist in Search of the Philosopher’s Stone, (Exhibited 1771), Joseph Wright of Derby (1734-1797). Oil on Canvas,...