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[[File:Hydrogen Tank - GPN-2000-001458.jpg|thumb|A large hydrogen tank in a vacuum chamber at the [[Glenn Research Center]] in [[Brook Park, Ohio]], in 1967]]
[[Image:Linde-Wasserstofftank.JPG|thumb|A [[Linde AG]] tank for liquid hydrogen at the [[Museum Autovision]] in [[Altlußheim]], Germany, in 2008]]
[[File:DOT Hazardous Material Placard liquid hydrogen.jpg|thumb|left|Two [[United States Department of Transportation|U.S. Department of Transportation]] placards indicating the presence of [[hazardous materials]], which are used with liquid hydrogen]]
In 1885, [[Zygmunt Florenty Wróblewski]] published hydrogen's critical temperature as {{convert|33|K|C F}}; critical pressure, {{convert|13.3|atm|psi}}; and boiling point, {{convert|23|K|C F}}.
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