Undercutting coal as cause of nystagmus........... 10, 44 Von Graefe, -, cited 14 43 miners' nystagmus in. 5, 6, 12, 13, 16, 47, 48, 54, 57 need of investigating.. 57 V. Vertical nystagmus, definition of. 30 Vertigo as symptom of nystagmus.. 37-39 Visual acuity, effect of nystagmus on.. 10, 17, 20, 23 7,41 |