Two ports are left in the front door for the burners. (In this case removable.) The door is 2 courses of bricks thick (the inner course is flush with the end of the arch and the second overlapping the inner wall and the arch). In the initial stages of firing, the top 3 or 4 rows of door brick are left down until all noticeable moisture has left the chamber.
The original object was scanned as a TIFF file on a Nikon Coolscan 4000 film scanner at approximately 4000 pixels on the long dimension. A 300 ppi JPEG file limited to 1024 pixels on the long dimension was then added to the CONTENTdm database.