[ 1 \text lb = 0.33333 \text viss \quad \text(exactly \frac13 \text viss) ]
That means the earlier factor is an approximation. The precise value is: lb to viss
| Pounds (lb) | Viss | |-------------|------| | 1 lb | 0.333 viss | | 3 lb | 1 viss | | 6 lb | 2 viss | | 10 lb | 3.333 viss | | 50 lb | 16.667 viss | | 100 lb | 33.333 viss | [ 1 \text lb = 0
[ 1 \text lb = \frac13.6 \text viss \approx 0.27778 \text viss ] lb to viss
[ \textviss = \textlb \times 0.33333 ]