Thermal Imaging Photographs
Woodpile and Ash Pits
Covering the Pot Furnace Photographs of Pots Photographs of Glass Waste Photographs of Glass Vessels
The total amount of wood consumed by both furnaces over the three week period was just over nine tonnes - less than predicted, but still consuming about one third of the woodpile.
In contrast, the amount of charcoal and ash produced was tiny, and could be measured in bucketfuls. Charcoal cleared from the furnaces each day continued to combust in the pits, gradually reducing to ash and keeping the temperature over 600°C just below the top of each pit, and at almost 500°C at the base.
A large quantity of glass waste was found in the ash when sieved. It varied in size from small globules less than 1cm in diameter to larger lumps 10cm and more in length. It included one very large lump over 30cm in length which was formed from the contents of one of the pots which cracked and emptied completely (photograph no.8, below).
"If you build it, they will come."