76 



NEW YORK STATE MUSEUM 



Common hollow brick 



Fireproofing 



Terra cotta 



Drain tile 



Pottery 



Paving brick 

 Emery 

 Feldspar 

 Garnet 

 Gypsum 

 Iron Ore 

 Mica 



Mineral waters 

 Natural gas 



Petroleum 



Salt 



Sand and gravel 



Sand-lime brick 



Stone 



Production of stone 



Granite 



Limestone 



Marble 



Sandstone 



Trap 

 Talc 

 Zinc 

 Index 



