That is kinda embarrassing to have to respond to Mr. T.
Anyway, would love to know the temp of the CO2 gas as it left the compression of the cylinder and the temp as it entered the test cylinder. If the CO2 inlet valve was turned off how long would the CO2 gas keep the temp down for?
Would be great to see the CO2 in the test cylinder kept at .02% at the beginning of the experiment, camera rolling, then CO2 increased to .04%, camera still rolling. Now that would be hilarious.
Atmospheric pressure in the chamber before and after the introduction of CO2?
CO2 concentration before and after?
How about the introduction of a comparative sample of Argon gas. Similar atomic weight to CO2 but known to not absorb infrared radiation?
Mr T, that experiment was NOT science, but pseudoscience.