He did not say that the bucket was hermetically sealed, like a barometer. Me, and I think most others, assumed that the bucket was open to the air.Seriously?!
Did you even read the post I was replying too??
"Take your clear tube and submerge many coils of it into a 5 gal bucket
of water ..."
You're telling me the laws of physics have changed and the level at the open end will not change as the ambient pressure changes?
Never mind. Don't see how Gregory's idea will work. A standard atmospheric pressure will support about 35' of water column, so unless you have a very deep basement to put the bucket in ... I doubt the alcohol will make that much of a difference.
Perhaps he omitted to mention taking the submerged end out of the bucket and fixing it at a suitable height?