an improvement in an apparatus for treating seeds or other particles with a liquid . the apparatus includes a receiving chamber for receiving particles and liquid , and means for conveying consecutive batches of particles and liquid to the receiving chamber . liquid is metered in batches through a liquid metering means which includes a container and a cyclic container transport . the latter is responsive to the conveyance of batches of particles to the receiving chamber and cycles the container between a dip position in a supply of treating liquid and a dumping position in which a batch of liquid is conveyed to the receiving chamber . the transport orients the container in its dip position so as to drain the container when the level of treating liquid recedes below the container . the retention of treating liquid in the container when the apparatus is not in use is thus avoided . the apparatus may include an auger for conveying particles and liquid from the receiving chamber with concurrent intimate mixing , the auger and receiving chamber being readily removable from the apparatus for cleaning .