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<blockquote data-quote="goingdef" data-source="post: 7729796" data-attributes="member: 584989"><p>The Antique Windowpanes Story</p><p></p><p>The question of antique windowpanes has been addressed by Plumb, 1989[2]. He noted the following:</p><p></p><p>[...W]hy are the panes of antique window glass thicker on the bottom than the top? There really are observable variations in thickness, although there seem to have been no statistical studies that document the frequency and magnitudes of such variations. This author believes that the correct explanation lies in the process by which window panes were manufactured at that time: the Crown glass process.</p><p></p><p>In other words, while some antique windowpanes are thicker at the bottom, there are no statistical studies to show that all or most antique windowpanes are thicker at the bottom than at the top. The variations in thickness of antique windowpanes has nothing to do with whether glass is a solid or a liquid; its cause lies in the glass manufacturing process employed at the time, which made the production of glass panes of constant thickness quite difficult.</p><p></p><p>manufacturing defects are not cool.</p></blockquote><p></p>
[QUOTE="goingdef, post: 7729796, member: 584989"] The Antique Windowpanes Story The question of antique windowpanes has been addressed by Plumb, 1989[2]. He noted the following: [...W]hy are the panes of antique window glass thicker on the bottom than the top? There really are observable variations in thickness, although there seem to have been no statistical studies that document the frequency and magnitudes of such variations. This author believes that the correct explanation lies in the process by which window panes were manufactured at that time: the Crown glass process. In other words, while some antique windowpanes are thicker at the bottom, there are no statistical studies to show that all or most antique windowpanes are thicker at the bottom than at the top. The variations in thickness of antique windowpanes has nothing to do with whether glass is a solid or a liquid; its cause lies in the glass manufacturing process employed at the time, which made the production of glass panes of constant thickness quite difficult. manufacturing defects are not cool. [/QUOTE]
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