Abstract: L-Felinine (2-amino-7-hydroxy-5,5-dimethyl-4-thiaheptanoic acid) can be used to attract a cat to eliminate in a litter box. The present disclosure provides litters containing L-Felinine, litter boxes containing L-Felinine, compositions containing L-Felinine that can be added to a litter and/or a litter box, and devices for adding L-Felinine to a litter and/or a litter box. In an embodiment, the L-Felinine can be applied to a litter and/or a litter box as an aqueous solution comprising at least about 0.2 wt % of L-Felinine, for example by spraying the aqueous solution of L-Felinine from a bottle or applying the aqueous solution of L-Felinine using a dropper pipette.

Abstract: A stone separation table (30,70) selectively separates and drops stones, clods, and dirt (27) between selected rollers while conveying potatoes (33) or other root crops from one side of the table to the other. The stone separation table incorporates sets of rollers (32,72) including separating (36,76) and spacing (40,80) rollers of substantially the same diameter. The sets of rollers are coplanar forming a planar conveying level (45,75) with all rollers driven in the same direction of rotation. The separating roller (36,76) is constructed with projecting elements, either projecting fingers (38) of a star roller (36) or bristles (78) of a brush roller (76) for receiving stones, clods, and dirt (27) for rotation downward and dropping in the separating passageway (42,82) between the separating roller (36,76) and spacer roller (40,80).