V.
Valves of heart, 48, 50
Varieties of protoplasm, 6
Vegetable food, 96
Veins, 48
Ventricles, 49
Veratria, 40
Vision, 73
Voluntary movement, 56 muscle, 34, 56
W.
Walking, 66, 84
Warmth, 83
Water, 95
_Ballière, Tindall and Cox, 8, Henrietta Street, Strand_