eating ducts from periphery to centre and being led off by an air pump.Brick Mac!lines--Jos. Whitely, Dunlap, Iowa. Four pairs of molds are on a plate rotating on a vertical axis by hand gearing over a fixed platform, having an opening for the descent of the brick on to an endless belt. The nearest mold while being filled by filled by hand has the one in advance pressed by a cam lever, which on further depression acta on another lever to expel the brick that is a step in advance.