De quoi est fait boulier
A counting board with movable pebbles or beads.
- Wooden frame — a pour partie. A frame with rods.
- Abacus beads — a pour partie. Movable beads — the places of a number.
- Abacus rods — a pour partie. Guides for the beads.
- Wood — est fait de. The counting board was made of wood.
- Stone — est fait de. Counting was done with pebbles — the Latin calculus.