ABSTRACT
Procedure 1. Obtain a string of wooden or plastic beads consisting of solid ellipsoids with volumes (mL) of 1, 2,
3, 4, 5, 6, 8, 10, 12, 15, 20, 25 and corresponding longitudinal dimensions (mm) of 15, 19, 23, 25, 27, 29, 32, 35, 37, 39, 43, 45, respectively.
