The ornamental design for a microscope, as shown and described.
FIG. 1 is a perspective view of a microscope showing our new design;
FIG. 2 is a second perspective view of FIG. 1 showing the telescoping nature of the eyepiece;
FIG. 3 is a top plan view of FIG. 1;
FIG. 4 is a bottom plan view of FIG. 1;
FIG. 5 is a right side elevational view of FIG. 1;
FIG. 6 is a left side elevational view of FIG. 1;
FIG. 7 is a first end elevational view of FIG. 1; and,
FIG. 8 is a second end elevational view of FIG. 1.
The dotted lines are intended to show features that are environmental only and form no part of the claimed design. All surface lines are merely intended to illustrate the contour of the surfaces represented.