FIG. 1 is a top perspective view of the cuvette assembly showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a right-side elevation view thereof;

FIG. 4 is a front-end elevation view thereof;

FIG. 5 is a rear-end elevation view thereof;

FIG. 6 is a left-side elevation view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a top plan view thereof; and

FIG. 9 is a cross-sectional view along lines 9--9 of FIG. 8 illustrating the "U" shape of the cuvettes in the assembly.