= Frank Watson Dyson
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{title2=1868–1939}
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<Frank Watson Dyson> coauthored the report of the 1919 eclipse observations with <Arthur Eddington> and <Charles Rundle Davidson>. The experiment tested the predicted bending of stellar <light> passing near the <Sun>.
Comparing stellar <positions> on eclipse and reference plates tested a small radial displacement. Changes in plate scale and focus could alter the signal, so the report assessed instrumental errors alongside its gravitational interpretation.<A determination of the deflection of light by the Sun's gravitational field by Frank Watson Dyson and others>[1919 observations and 1920 report: observing arrangements, plate comparisons and inferred solar-limb deflection]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Frank%20Watson%20Dyson.jpg?width=260]
{title=Portrait of <Frank Watson Dyson>}
{description=Bain News Service; George Grantham Bain Collection, Library of Congress, ggbain.30244. Public domain / no known copyright restrictions (PD-Bain). Source and usage information on the linked Wikimedia file page.}
{source=https://commons.wikimedia.org/wiki/File:Frank_Watson_Dyson.jpg}
{width=260}
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