An undivided 3/16th interest in and to all of the oil, gas and other minerals in and under a tract of land situated in the SW/4 of Section (24), Township (23) North, Range (21), W.I.M., being described as follows: Beginning on the Section line between Sections (23) and (24) at the NW corner of the SW/4 of said section (24), thence running East a distance of 42 rods; thence South a distance of 160 rods, thence West a distance of 42 rods; thence North a distance of 160 rods to the point of beginning, and containing 42 acres