Society of Glass Technology · [Sheffield] · leaf 355
s are capable of scientific explanation; for example,the object of mixing chopped hay and horse-dung with the clay T—2 2G8 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. for the roof of the kiln was to make it porous and so prevent crack-ing, and it is possible the Israelites were unable to make… … Fig. 3. is carbonised and so the fireclay becomes full of cavities like asponge and less liable to crack. There was also sound reason for placing the blue and greenglasses on the tray near the mouth of the furnace, where on accountof cold mouth from which all kilns suffer, they would receiveless…
Glass
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