Abstract: An incubation apparatus containing a rack or block with openings capable of receiving containers containing reagents. The rack or block is attached to a heating element for heating containers in the block. The block is driven by a motor actuated by a timer such that at the end of a predetermined time period the block is pivoted whereby containers will fall out of the block and onto a sloping surface on the housing of the incubator. This apparatus provides for the carrying out of reactions for a predetermined amount of time without the necessity of close monitoring of the incubation by laboratory personnel.