Desktop Magnifying Glass

FIG. 1 is a perspective view of a desktop magnifying glass showing the design; FIG. 2 is a front elevation view thereof; FIG. 3 is a rear elevation view thereof; FIG. 4 is a left side elevation view thereof; FIG. 5 is a right side elevation view thereof; FIG. 6 is a top plan view thereof; FIG. 7 is a bottom plan view thereof; and, FIG. 8 is a second perspective view thereof. Broken or dotted lines show surface shading or structural features of the desktop magnifying glass, and do not represent elements of the claimed design.