FIG. 1 is a front perspective view of a microscope tube of our invention;
FIG. 2 is a left side view of the microscope tube of our invention;
FIG. 3 is a front view of the microscope tube of our invention;
FIG. 4 is a right side view of the microscope tube of our invention.
FIG. 5 is a rear view of the microscope tube of our invention.
FIG. 6 is a top view of the microscope tube of our invention.
FIG. 7 is a bottom view of the microscope tube of our invention; and,
FIG. 8 is a front perspective view of a microscope tube of our invention; the broken line showing of a microscope stand and microscope eyepiece are for illustrative purposes only and form no part of the claimed design.