Both cementation and crucible furnaces were definitely in use, but the glassworks was sold off during the 1850s to Melling, Carr and Co, who operated it until the start of the 20th century.
12.
There is another book by Gingery, not usually counted as part of the series, entitled " Building a Gas Fired Crucible Furnace ", which can be substituted for that describing the charcoal foundry.
13.
Roach installed a 10-ton Siemens furnace and an 18-pot Siemens crucible furnace, allowing for the production of 18, 000 tons of steel ingots and 3, 000 tons of steel castings per annum.
