Sample holder of a scientific testing instrument

FIG. 1 is a front perspective view of a sample holder of a scientific testing instrument showing our design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown are included for the purpose of illustrating portions of the sample holder of a scientific testing instrument and form no part of the claimed design.