= Thomas Andrews
{disambiguate=scientist}
{c}
{title2=1813–1885}
{wiki}
= Thomas Andrews
{c}
{synonym}
<Thomas Andrews> measured the <pressure>-<volume> behaviour of <carbon dioxide> around its liquid-gas critical region. Coupled capillaries and controlled <water> jackets connected <pressure> changes with <temperature> and the visible disappearance of a phase boundary.
The observations show how a liquid can be connected continuously with a gas by a path around the <critical point>. They distinguish a phase-boundary crossing from every possible change between liquid-like and gas-like densities.<The Bakerian Lecture: On the Continuity of the Gaseous and Liquid States of Matter by Thomas Andrews>[1869, pages 576–580 and Plate LXIII]{ref}
A <chemist>.https://www.qub.ac.uk/News/Allnews/2024/Queens-University-Belfast-pioneer-Thomas-Andrews.html[Independent biographical identity and professional specialization]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Richard%20Hooke%20(1820-1908)%20-%20Professor%20Thomas%20Andrews%20(1813%E2%80%931885)%20-%20QUB%2035%20-%20Queen's%20University%20Belfast.jpg?width=250]
{title=Portrait of <Thomas Andrews>}
{description=Richard Hooke (1820–1908), painting; reproduction photographer not identified. https://www.qub.ac.uk/sites/StaffGateway/staff-blog/blog-celebrating-thomas-andrews-a-founder-of-queens-and-science-in-northern-ireland.html[No free license verified; external biographical illustration under the user-authorized fair-usage policy], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:Richard_Hooke_(1820-1908)_-_Professor_Thomas_Andrews_(1813%E2%80%931885)_-_QUB_35_-_Queen%27s_University_Belfast.jpg}
{width=250}
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