FIG. 1 is a perspective view of a first embodiment of a humidifier showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is a cross-sectional view taken along the line 9-9 shown in FIG. 7;
FIG. 10 is a perspective view of a second embodiment of the humidifier;
FIG. 11 is another perspective view thereof;
FIG. 12 is a front elevational view thereof;
FIG. 13 is a rear elevational view thereof;
FIG. 14 is a left side elevational view thereof;
FIG. 15 is a right side elevational view thereof;
FIG. 16 is a top plan view thereof;
FIG. 17 is a bottom plan view thereof; and,
FIG. 18 is a cross-sectional view taken along the line 18-18 shown in FIG. 16.
The broken lines in the drawings depict portions of the humidifier that form no part of the claimed design.