INDEX. 873 



PAGK 



Volcanic Products. (Illustrated.) 347 



Volcanoes, The Supposed, in Central Asia 715 



Volcanoes : Their Action and Distribution. (Illustrated.) 43 



Vortex-Rings, Studies of. (Illustrated.) 175 



Ward, Stanley M 242 



Warner, Dr. Francis 584 



Whales and their Habits 423 



Winslow, Erving 683 



Winslow, Lieutenant Francis 29, 145 



Woman Question, The, from an Anthropological Point of View 275 



Word-Blindness 570 



World-Problems, The Seven 433 



Worry 102 



Yandell, David W 498 



Yorktown Centennial, Further Lessons of the 268 



END OF VOL. XX. 



