= Heike Kamerlingh Onnes
{c}
{title2=1853–1926}
= H. Kamerlingh Onnes
{c}
{synonym}
A <physicist>.https://actorenregister.nationaalarchief.nl/actor-persoon/kamerlingh-onnes-prof-h-te-leiden[Independent biographical identity and professional specialization]{ref}
<Helium liquefaction> supplied a route to very low <temperatures>. The <resistance-versus-temperature experiment for superconductivity> and measurements of <superconducting persistent current> show how reaching those conditions opened new questions about electrical behavior.
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