7 6 



NEW YORK STATE MUSEUM 



Common hollow brick 



Petroleum 



Fireproofing 



Salt 



Terra cotta 



Sand and gravel 



Drain tile 



Sand-lime brick 



Pottery 



Stone 



Paving brick 



Production of stone 



Emery 



Granite 



Feldspar 



Limestone 



Garnet 



Marble 



Gypsum 



Sandstone 



Iron Ore 



Trap 



Mica 



Talc 



Mineral waters 



Zinc 



Natural gas 



Index 



