Calamine brass slowly phased out as zinc smelting techniques were developed in Europe, which produced metallic zinc more suitable for brass production than calamine. However, the conversion away from calamine brass manufacture was slow; a British patent was awarded to William Champion in 1738, but the alloying of metallic zinc and copper to produce brass was not patented until 1781 (by James Emerson), and calamine brass mills persisted in South Wales until as late as 1858. The slow diffusion of this technology was probably the result of economic factors. Calamine brass Calamine brass is brass produced by a particular alloying technique using
Extracted of "Electric Sheep" called it "an excellent science-fiction thriller that, while reminiscent of a number of other films ... improves on all its predecessors". Jeremy Kirk of First Showing rated it 8.5/10 and described it as "a classic case on how indie science fiction works", focused on character and narrative. "Starburst" rated it 5/10 stars and wrote that the film's execution falls short of its "fascinating, thought-provoking" premise. Extracted Extracted, also known as Extraction in the UK, is an independent 2012 American science fiction thriller directed and written by Nir Paniry. Sasha Roiz stars as a scientist whose consciousness becomes