Laboratory Mill

The file of this patent contains at least one drawing/photograph executed in color. Copies of this patent with color drawing(s)/photograph(s) will be provided by the Office upon request and payment of the necessary fee. FIG. 1 is a front perspective view of a laboratory mill according to the design; FIG. 2 is a right perspective view thereof; FIG. 3 is a left perspective view thereof; FIG. 4 is a rear perspective view thereof; and, FIG. 5 is a top perspective view thereof. The bottom side of the laboratory mill does not form part of the claimed design. The broken lines represent the bounds of the claimed design; the broken lines form no part of the claimed design.