The iron works, on the bank of the River Douglas, consisted of a foundry, five cupola furnaces, three air furnaces for making the largest castings and another foundry for smaller pieces.
12.
Around 1820 Moses Teague, whilst borrowing the cupola furnace at Darkhill Ironworks, discovered a way to make good iron from local coke, greatly advancing the iron and coal industries of the Forest of Dean.
13.
A "'cupola "'or "'cupola furnace "'is a melting device used in foundries that can be used to melt cast iron, ni-resist iron and some bronzes.
14.
However, traces of stone Roman cupola furnaces were found during excavation of new subdivisions ( Parc des Hayes ) ( ) . [ Radiocarbon dating ] of 2000 2300 years show the human presence in the town since the Iron Age.
15.
Others were also quarrying in that area . " Messrs . G . & C . Hoskins being supplied by Messrs . Curlewis, also of "'Wall's Siding "', the dolomite in this instance being calcined in a cupola furnace before railing to Lithgow ".
16.
"Kupolofen " : I found a commercial website about these in Germany and then clicked on the British flag icon to find the English translation of the same page-- which took me to " cupola furnace ", which Wiki tells me is another name for a " blast furnace " ( or perhaps just a type of blast furnace ?-see Hochofen ).
