 LAT glass in
some form has existed from the earliest times. Only in the
last few centuries, however, has it been manufactured in
sufficient quantity and at a cost low enough to make it
available for general use.
It is interesting to note that the
term "flat glass" until very recent years has been a misnomer.
All of this so-called flat glass for use in windows and for
similar purposes, with the exception of plate glass, which
does not come within the province of our story, was slightly
"bowed." It was not until an entirely new process of
manufacture was perfected that absolutely flat glass was
made available to the world.
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