The National Gallery of Practice Science, Blending Instruction with Amusement (or Adelaide Gallery) was established in 1832 by the American inventor Jacob Perkins on Adelaide Street, West Strand, London. The gallery showcased modern inventions and curiosities, and popular exhibits included Perkins's steam gun, which was demonstrated throughout the day, and electric eels. In the 1840s, the gallery was sold and converted to a casino and amusement hall, and it later became a marionette theatre.