That’s a myth. Glass is not a "slow-moving liquid” at room temperature. Viscosity of glass is up to a billion times higher than lead. Since lead is used to hold stained glass windows together, the lead would flow down and out long before any shift in the glass would be detectable by any realistic measurements.Glass sheets used to be made by spinning a molten glob of glass. It was impossible to get a perfectly even sheet this way. When the sheet was cut into panes, the thicker edge was always installed down for several excellent reasons that are irrelevant here. The panes in those windows that are thicker at the bottom have not changed from the day they were installed.
tigre1 almost 13 years ago
Glass is still a liquid. Stained-glass windows change and drip and droops…very slowly. Over centuries…
garycarroll almost 13 years ago
That’s a myth. Glass is not a "slow-moving liquid” at room temperature. Viscosity of glass is up to a billion times higher than lead. Since lead is used to hold stained glass windows together, the lead would flow down and out long before any shift in the glass would be detectable by any realistic measurements.Glass sheets used to be made by spinning a molten glob of glass. It was impossible to get a perfectly even sheet this way. When the sheet was cut into panes, the thicker edge was always installed down for several excellent reasons that are irrelevant here. The panes in those windows that are thicker at the bottom have not changed from the day they were installed.
JazzInTN almost 13 years ago
So… Where’s the hydrogen peroxide?
Shikamoo Premium Member almost 13 years ago
How did the comments wind up all about glass? Cartoon science?
pickyX2 almost 13 years ago
So … is the glass half empty or …. ?