INDEX. 
1G7 
Y. 
Yellow copper ore - 
_ 
Page 
66, 67 
Yellows - 
- 
66 
Yorkshire pottery 
- 
- 125 
z. 
Zaffre 
Zechstein - 
~ 
- 96 
79 
Zeolites 
P AGE 
- 118 
Zinc - 
95 
Zinc blende 
13,70,82 
Zinc ores 
70, 82 
Zinc smelting 
95 
Zinc white - 
- 95 
Zincing 
- 98 
Zincite 
- 82 
Zircon 
- 115 
Zircouite 
- 115 
