On Tuesday, 27 September 2016 09:39:44 UTC+1, JohnD wrote:
"Alastair" wrote in message
...

The other explanation for Pictets experiment was by Prevost (1790) who
proposed what is now called Prevost's theory of exchanges which states that
each body radiates emits to and receives from other bodies free radiant a
very rare fluid, rays of which, like light rays, pass through each other
without detectable disturbance of their passage.
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Whatever happened to Mr Occam?

He died long before the wave particle duality of electromagnetic radiation was an issue.


Those two concepts correspond to the wave particle duality of light.

In which way exactly?

Rumford proposed to two rays of waves; Prevost proposed two rays of a physical fluid.