#Viscosity windows of old keygen#
And there's this one from Wikipedia, "If glass flows at a rate that allows changes to be seen with the naked eye after centuries, then the effect should be noticeable in antique telescopes.Īny slight deformation in the antique telescopic lenses would lead to a dramatic decrease in optical performance, a phenomenon that is not observed". Nick offered this simple analogy, ".if the windows found in early Colonial American homes were thicker at the bottom than the top because of "flow" then the glass found in Egyptian Tombs should be a puddle." Wow, that was a shocker. I was made aware of the fallacy of the glass flows myth many years ago by the late great glass chemist, Nick Labino. If you're still a believer in glass flow after that then Read On! Okay, lets get to the heart of the myth of glass flow, but before reading on do some research and look up the word "poise" and then when you understand what poise is then look up the poise of lead and glass. What could I have been thinking when I accepted the "fact" that the Rose Window would soon spill out of the confines of the lead cames that have held it in place all these years.
My blind acceptance of what I thought passed for fact should not be a trait of the curious mind. Without question I accepted the myth of glass flow. There was a time, in the dim dark past that, in my ignorance I believed in the myth of glass flow. (I read it on the internet so it must be true). The acceptance of that story is not based on fact but on a mythological story that has been circulating for many many years. This urban legend would have us believe that the windows in colonial homes and in very old stained glass windows are thicker at the bottom than at the top because glass is a "supercooled liquid" and is slowly flowing. The idea that glass after being formed is in a state of flux concerns the belief, held by many, that because glass is a "super cooled liquid" it actually has a degree of "flow" at temperatures within the human comfort range.
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