NATIONAL PHYSICAL LABORATORY (C) CROWN COPYRIGHT / SCIENCE PHOTO LIBRARY NATIONAL PHYSICAL LABORATORY (C) CROWN COPYRIGHT / SCIENCE PHOTO LIBRARY
Collins helium cryostat being used by a researcher. This apparatus, designed by US physicist Samuel C. Collins and colleagues in 1946, was designed to liquefy helium. Liquid helium forms at extremely low temperatures, around minus 268 degrees Celsius, and special cooling techniques are required to liquefy the gas. Photographed in 1953, the Physics Division of the National Physical Laboratory, Teddington, UK.
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