FIG. 1 is a perspective view of the sample holder;

FIG. 2 is a top view of the sample holder;

FIG. 3 is a side view of the sample holder;

FIG. 4 is a bottom view of the sample holder;

FIG. 5 is an end view of the sample holder; and,

FIG. 6 is an enlarged partial cross-sectional view thereof, taken along the line 6--6 of FIG. 1.