I want to know the answer to the following question:
What is the name for the glassmaking method that involved spinning it into sheets?
All the background I'm provided with is that "The observation that old windows are sometimes found to be thicker at the bottom than at the top is often offered as supporting evidence for the view that glass flows over a timescale of centuries, the assumption being that the glass has exhibited the liquid property of flowing from one shape to another.". Is that enough to answer the question?