velocity of water towards the rim 18 minimizing the water 39 s loss of momentum through turbulence such as might be caused if floor 30 were all horizontal the receiving chamber 29 communicates at its front edge with the rim 18 so as to direct water along both sides of the bowl in both a clockwise and counter clockwise direction about the interior of rim 18 toward the front of the toilet 10 the rim 18 has a generally rectangular cross section on the sides of the bowl and the lower side of the rim forms a floor 32 fig5 shows that floor 32 is perforated by a plurality of holes 34 36 and 38 the rim 18 is mounted so that the floor 32 projects inward over the bowl 16 to allow the water passing from inside the rim 18 through holes 34 36 and 38 to flow down the inner surfaces of the bowl 16 holes 34 produce cleaning streams 72 whereas holes 38 and 36 produce a siphon initiating jet 66 and shepherding streams 68 referring again to fig2 the lowermost portion of bowl 16 forms a sump 40 the sump 40 is a steep depression in the inner surface of bowl 16 intended to concentrate solid waste within its volume sump.