FIG. 1 is perspective view of a microscope housing showing my new design, with the broken-line showing of a handle and lenses being environmental only and forming no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof, the left side elevational view being a mirror image;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view of an alternative embodiment of a microscope housing showing my new design, the broken-line showing of the lenses being environmental only and forming no part of the claimed design;

FIG. 8 is a top plan view thereof;

FIG. 9 is a front elevational view thereof;

FIG. 10 is a right side elevational view thereof, the left side elevational view being a mirror image;

FIG. 11 is a rear elevational view thereof; and

FIG. 12 is a bottom plan view thereof.