Zinc for discovering pure metallic zinc, even though Swedish chemist Anton von Swab had distilled zinc from calamine four years previously. In his 1746 experiment, Marggraf heated a mixture of calamine and charcoal in a closed vessel without copper to obtain a metal. This procedure became commercially practical by 1752. William Champion's brother, John, patented a process in 1758 for calcining zinc sulfide into an oxide usable in the retort process. Prior to this, only calamine could be used to produce zinc. In 1798, Johann Christian Ruberg improved on the smelting process by building the first horizontal retort smelter. Jean-Jacques Daniel
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