360 



INDEX. 



Water, chemical action of.... 186 



Water, circulation of 168 



Water encroaching on land.. 181 

 Water, erosive power of.. 182, 184 

 Water, proportion of land to 159 



Weathering 187 



Whales of post-tertiary period 412 

 White lead... 81 



Xanthidia 362 



Zaffre 85 



Zeuglodon cetoides 381 



Zinc 83 



Zinc, sulphuret of. 57 



Ziphodon 382 



Zircon... .. 136 



THE END. 



