I wanted to post the following as a further response to Mark Hill's excellent talk on glass but comments are closed. Such a shame they do not remain open for a week.
Coincidentally the day after watching Mark Hill's talk I read this in Donna Tartt's excellent novel THE LITTLE FRIEND. "As the sun rose, the bubbled glass paperweight on Libby's mantelpiece would glow again into life, its little gleaming life of three hours, only to sink into darkness and slumber again when the triangle of sunlight passed over it, at noon." The sentence sprang off the page at me and probably would not have done so had I not just watched Mark's talk. It also got me thinking of Janet Fish's exquisite paintings of domestic glass items which I love. So many personal connections inspired by art.