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.