stone 91 hammer nut with stone Use stone to hammer nut on stone anvil or wood anvil: Customary at Bossou and Ta; Ebo; also at Nimba. At Bossou, only stone anvil used. At Ebo, stone hammer used in tree. Absent at Mahale. See video. hammer nut with wood Use wooden club to hammer nut on wooden or stone anvil. Customary only at Ta. Absent at Mahale. See Fig. 19. H Fig. 19 Hammer nut with wood: Drawn from photo of chimpanzees of Ta hand clap See clap hand. hand-clasp See groom-hand-clasp. hand-rubbing See rub hand/feet. hand support See transport with hand support. 92 hang tripedal handedness Preference for use of right or left hand. Handedness for tool use was found on individual basis, but not found population-level among