The “saggers” are stacked inside this kiln. You can see the square backs of the furnaces placed at close intervals round the base of the kiln. it is unusual for a kiln to be empty. The N.M.D. photographers were lucky enough to find this kiln under repair. The brick floor is being renewed. The picture gives a good idea, as you look at the cross-section of floor, of the way the air heated by the furnaces percolates through the floor. The “saggers” are stacked about 8 ft. or 9 ft. high. It is not direct contact with the furnace fires that bakes the pottery, but the rapid circulation of the heated air (conducted by the shape of the domed roof), which is drawn through the floor and through the porous “ saggers.”

Korero (AEWS), Volume 2, Issue 6, 27 March 1944, Page 18

The “saggers” are stacked inside this kiln. You can see the square backs of the furnaces placed at close intervals round the base of the kiln. it is unusual for a kiln to be empty. The N.M.D. photographers were lucky enough to find this kiln under repair. The brick floor is being renewed. The picture gives a good idea, as you look at the cross-section of floor, of the way the air heated by the furnaces percolates through the floor. The “saggers ” are stacked about 8 ft. or 9 ft. high. It is not direct contact with the furnace fires that bakes the pottery, but the rapid circulation of the heated air (conducted by the shape of the domed roof), which is drawn through the floor and through the porous “ saggers.”