Just four years later in 1902 Robert Henry Thurston among others acknowledged, that the heat distribution of the then modern steam engine was best shown by the use of the so-called "Sankey Diagram".
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From 1879 to 1882 he was instructor at the Royal Military College, Kingston, Canada, and from 1882 to 1889 back in England working for the Ordnance Survey Establishment at Southampton.
Sankey diagrams are named after Irish Captain Matthew Henry Phineas Riall Sankey, who used this type of diagram in 1898 in a classic figure (see panel on right) showing the energy efficiency of a steam engine.
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