Chapter 426: Chapter 425: Black Fire Brick

After deciding to hire Crooked Hat William to teach in the yet-to-be-established technical school, Lord Russell, accompanied by William and his son, inspected the Blackfire Brick Kiln.

The Black Oil furnaces were already operating, with no standardized equipment customization. These Black Oil furnaces were designed based on the masters' experience, but the results were quite impressive, with the output being no worse than coal.

Slag bricks could now be mass-produced and were being transported continuously to the construction site of the new castle.

"Sir, look," William pointed to the smoking chimney. The chimney was thick, surrounded by a ring of stair scaffolding, "This chimney not only expels smoke but also air-dries the clay bricks using the black smoke produced by burning Black Oil."