492 
THE ANCIENT VOLCANOES OF GREA T BRITAIN 
Wunsch, E., i. 369, 392 
Wiirtemberg, puys of, i. 46 
Wyoming, lava-fields of, ii. 115 
Yates, J., i. 171 
Yellowstone Park, volcanic phenomena of, i. 29, 
31 
Y-foel-fras, i. 209, 214 
Y Glyder-Eaeli, i. 209 
Yoredale group, ii. 9, 13, 17 
Young, Mr. John, i. 369, 392 
Young, Prof. John, i. 294, 308 
ZritcoN, found in volcanic vents, i. 62 
Zirkel, Prof., ii. 327, 329, 334, 356, 364, 370, 
372, 379, 430 
THE END 
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