On 07/08/2015 19:08, Alastair wrote:
On Friday, 7 August 2015 18:08:18 UTC+1, JohnD wrote:

Forget Dawlish, but observe that no-one else here, not one single person,
has posted support for this notion. Remember also that the readership here
contains a very considerable amount of scientific expertise and insight, yet
no-one, no-one at all, believes 'cold radiation' is a credible concept.

What they believe is not scientific proof, and what you are using is a fallacious ad hominem argument.

Attacking me rather than my arguments. What is your answer to my four questions?

If you think that then you have clearly lost the plot entirely.

"Cold radiation" is the stuff of dodgy double glazing salesmen.

Let's discuss the science, not resort to political point scoring.

The experiment showing that cold can be radiated was performed in the 18th Century and it is described in this paper:
http://www2.ups.edu/faculty/jcevans/...experiment.pdf
Pictet's experiment is not well known, so it it is not surprising that people in this newsgroup have not heard of it.
But he did show that if the radiation from a flask filled with ice is
focussed with mirrors onto a thermometer then its
temperature will fall. And this happened before Herschel "discovered"
infrared radiation.

But all that does is make it so that the ice subtends a larger angle at
the thermometer. Reflective mirror surfaces are not black bodies. He
didn't understand the thermodynamics of his experiment at the time - and
he had an excuse - you do not. You are tilting at windmills.

It is not for nothing that Thermos flasks are made with a mirror finish.

Actually, it all came about as a result of Horace-Benedict de Saussure FRS, described by R.G. Barry
as the First Alpine Meteorologist", discovering the greenhouse
effect. You can read about it here
in my translation of Chapter 35 of his book "Voyages dans les Alpes".
http://www.abmcdonald.freeserve.co.u...APTER%2035.pdf

Cheers, Alastair.


I don't doubt that in the time before people understood that thermal
radiation was another form of electromagnetic radiation you can find all
sorts of quackery being written about "cold radiation" but that does not
make it real any more than "Polywater" or "N-rays".

https://en.wikipedia.org/wiki/Polywater
https://en.wikipedia.org/wiki/N_ray

If you wish to totally destroy your own credibility even more completely
than you have done already keep on flogging this dead horse.

--
Regards,
Martin Brown