...But it is not so clear whether the intense glow of the hydrogen wascaused by combustion or by intense heat without combustion... 
Richard A. Proctor 「Myths and Marvels of Astronomy」
...From each square foot in thesurface of the sun emerges a quantity of heat as great as could beproduced by the daily combustion of sixteen tons of coal...
Robert Stawell Ball 「The Story of the Heavens」
... If particles of iron, sulphur, and water be mixed together, these bodies thus capacitated to act on each other, are heated by degrees, and ultimately produce a violent combustion...
Paul Henri Thiery (Baron D'Holbach) 「The System of Nature, Volume 1」
...As the new fires of the star in the Crown died outrapidly, it is possible that in their case there was actual combustion...
Richard A. Proctor 「Myths and Marvels of Astronomy」
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