CONTENTS. 



* Page 



Clay and Clay Products 23 



Ball Cla}- or Plastic Kaolin 23 



Brick and Tile 24 



Diatomaceous Earth ' 26 



Fullers Earth 28 



Lime 36 



Limestone 39 



The Everglades of Florida, limestones of 41 



geology of 41 



Materials for Mortar and Concrete 46 



Peat 59 



Phosphate Rock 65 



Road Materials loi 



Sand and Gravel 102 



Sand-lime Brick 103 



Water Supplies T04 



22 



