Annual report of the Regents . o X3 CLAYS OF NEW YORK 679 three or four chambers before conducting it off to the stack, forthe reason that the hot air collects moisture from the bricks inthose chambers which are being heated up, and if not drawn offwhen nearly saturated, and before it has cooled down too much, itwill begin to deposit moisture and soften the green bricks. Each chamber has a capacity of 20,000 to 22,000 brick. Whenthe partitions between ai-e permanent they are of brick, but thetemporary ones are built of heavy paper. The manner of firing varies. In the original kiln not only did
Annual report of the Regents . o X3 CLAYS OF NEW YORK 679 three or four chambers before conducting it off to the stack, forthe reason that the hot air collects moisture from the bricks inthose chambers which are being heated up, and if not drawn offwhen nearly saturated, and before it has cooled down too much, itwill begin to deposit moisture and soften the green bricks. Each chamber has a capacity of 20,000 to 22,000 brick. Whenthe partitions between ai-e permanent they are of brick, but thetemporary ones are built of heavy paper. The manner of firing varies. In the original kiln not only didit take place through doors at the bottom, but coal slack was alsofed into the kiln through openings in the top. Many manufac-turers ,no longer pursue the method of top firing. In I^ew York state continuous kilns are used for burning com-mon and paving brick. Sorting After the bricks are burned they have in every case to be care-fully sorted, for no kiln produces 100^ of bricks which are product of a kiln of common b
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