Glass: Material from the sands of time

Comments on article "Glass: Material from the sands of time"
Name Views and CommentsDate
Julius rono I want to know the materials used to manufacture glass 8/28/2009
loulou i want the material of galss only 11/23/2006
mckezie kirad there could me more expantion on the information on how glass forms, other than that I am happy with the contence. 4/12/2006
boby how to tell time with a sand glass? 4/25/2005
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