VIII B, 340; X, 628 629 ; XI

bis, 24-25, 28, 45.

Verte (couleur) : XI, i58; XII, 72 et 74. Voir Couleurs.

Vibrations : IV, 385, 3gi, 416, 417, 5oo-5oi,5o3, 5ii-5i2, 543-544, 547- 548, 559, 56o-56i, 583, 593, SgS, 597-600, 621-623, 638-639, 676-677, 678; V. 420.

Vide (point de) : I, 2o5-2o8, 228, 3oi, 417; II, 138,382,399,440,442,465, 481, 482, 483, 496, 573, 574, 588, 618-619, 622-623, 63i-632 ; III, 75, i3ï, 165.613,632-623,644-645,686; IV, 108-109, 329, 700; V, 104-105, ii5-ii6, 116, 117-118, 143-144, 190-

273, 3o2-3o3, 342; VI, 86-87 (587); VIII (IX B), 42 (66), 49-5o (71-73), io5 (128); X, 37, 473, 545-546.587; XI, 16-23, 624-625 ; XI bis, 13-14.

Vie (conservation et prolongation de

la): I, 397, 434-435, 463, 507, 509;

II, 984, 285, 480; IV, 32g, 441-442 ;