Abstract: A table top two-digit game display counter is disclosed, in which a manually changeable player's score is displayed on two sets of wheels having numeric indicia inverted from each other for easy reading by the player and the other players. The counter is capable of displaying a score between 0 and 99, with each start and reset capabilities. By rotating a centrally located exposed thumb wheel, the player can incrementally change his score display either up or down by one, with each detented increment. When the ones display dial is rotated from nine to zero, or from zero to nine, a counter mechanism automatically rotates the tens wheel to the next digit.

Abstract: A modular apparatus for evaluating flow processes. The apparatus has (i) a closure for a chamber, the closure defining at least one aperture and at least one seating basin facing away from the chamber; and (ii) at least two stacking elements cooperatively associated with each aperture for defining at least one fluid passage communicating with the aperture when stacked on one seating basin, the elements when stacked having mating walls meeting at a parting plane or line along the length of the passage, each element sealingly mating with each other, and one of the elements sealingly mating with the basin. The bottom stacking element snugly seats in and on the basin and defines a surface cooperating with the closure to form a cradle for a top stacking element when placed thereon.