The sedimentation volumes of starch, magnesium oxide, ferric oxide, and talc in a series of liquids have been measured. The results are greatly influenced by the presence of small quantities of water. Increase in sedimentation volume is related to the degree of flocculation in the system, leading to a branched-chain scaffolding type of structure. Viscosity determinations show that such structures possess rigidity, which is absent in systems showing a small sedimentation volume. The effect of flocculation is particularly large in suspensions of aniso-dimensional particles.