Experiment of Leith was a catamaran engineered by the Scottish banker Patrick Miller of Dalswinton, to be used by the Swedish fleet in the Russo-Swedish War (1788-90).
[3] Experiment of Leith was anchored to the east of the island of Skeppsholmen in Stockholm where it remained for over four years until it was sunk in 1794 in order to form part of the foundation for a bridge.
[1][4] The ship was a smaller version of one of Miller's earlier plans for a warship, which had been referred to by Swedish naval architect Fredrik Henrik af Chapman as the "Sea-Spook".
It was the size of a snuff box and is kept today at the Victoria and Albert Museum[6] together with the letter of thanks from the Swedish king, dated 20 May 1791.
[3] The box contained swede seeds which Miller planted, and which are said to have started the Scottish taste for turnips[1][3] or "neeps", eaten for example as a classic side to the national dish haggis.