Fig. 1.

Cross-section of a furnace showing a central chamber with a dome-shaped roof, a chimney on the left, and various access ports and structural elements labeled with letters.

Fig. 5.

Plan view of a circular furnace showing concentric rings and a central square opening, with labels A and B indicating different parts of the structure.

Fig. 2.

Perspective view of a dome-shaped furnace with a central door and various structural details labeled with letters.

Fig. 3.

Detailed cross-section of a large, arched furnace structure with brickwork, showing internal chambers and external access points.

Fig. 4.

Plan view of a square furnace showing a grid of smaller squares and various access points labeled with letters.

Fig. 6.

Plan view of a small, square furnace structure with a central opening and surrounding walls.

Fig. 7.

Perspective view of a long, arched structure, possibly a furnace or a series of connected chambers, with labels A, B, and C.

Fig. 8.

Plan view of a rectangular furnace structure with internal partitions and access points labeled with letters.

Fig. 9.

Perspective view of a rectangular furnace structure with a central opening and various structural elements labeled with letters.

Fig. 10.