Quote (Pharmdizzle @ Jun 5 2012 03:44pm)
It is the pitch experiment. It's been going on for 80-90 years and some drops every 5-12 years depending. A drop has never been seen.
It's similar to glass, which is actually a fluid, and slowly overtime will sink down.
Glass is a solid.
It retains properties that can cause the molecular structure to become amorphous if it undergoes rapid cooling.
Hence, high quality glassware is cooled very slowly to facilitate a crystalline molecular structure.
The thoughts following antique glass being thicker at the bottom is directly related to the methods that were available at the time for producing glass panes. In other words, they lacked the technology we have today to keep a pane of glass at a constant thickness during production.