324 J- STANLKY-I3K0AVX— INIMOX TO VOLUMES 21 TO 30 



I'age 



Yeates, W. S., Geological work in Georgia of 25. 1T4 



Yellowstoxk natural hridgo, Description of and view sliowing... 21,322,323 



— National Park, Alga' of 37, 156 



, Classification and composition of tliernial springs of 22. 114 



, Natural bridge across liridge Creek in. ." 21. 322 



, Number of sinMngs in 22. HI 



, Origin of the thermal waters in the 22, 1<'3 



, Radioactivity of thermal waters of 22, 121 



springs and geysers, Development of 22, 118 



. Suumiary of the origin of the thermal waters in the 22, 122 



thermal springs, Gases from 22, 1 17 



— Park region, Climatic conditions of 22, 109 



, Lakes and bodies of water in 22, 110 



, Periods of time indicated in the 22, 10-i 



— River, Pleistocene valley of 27, 299, 300 



YosEMiTE region. Recent studies of 27, 46 



— valley, Cliff sculpture of the 21, 20, 759 



.^ Lessons of the little • 22. 65, 730 



YorNG, S. W., introduced l>y C. F. Tolman, .Tr 26, 393 



— ; Some chemical factors affecting secondary sulphide ore enrichment 26,393 

 YouxGS, L. .T.. Analysis of concretions by 25. 79 



— cited on clieniical analysis table 27, 54 



Ypresian and Sparnaciau equivalent to Wasatch 25, 396 



YtTCATAN, Climatic changes in 25, 539 



— , Geology /of 29, 617 



Yucce^ of the West Indies 29, 651 



YUKON-A1.ASKA boundary l)etween Yukon and Porcni)ine rivers. Geolog- 

 ical section along 2-4, 52, 678 



__ — line, Geological section along tlie 25. 179 



— geological formations 23, 334 



— international l)oxuulary. Area of studies along 23, 3.34 



YuKOX and Alaska, Differential erosioii and eqniplanation in portions 



of 23, 333-345 



— plateau 23, 337 



z 



Zaccagna. D., cited on spheroidal diabase 25, 600 



Zaloziecki, R., cited on origin of oil 28, 729 



"Zaphbektis," Carboniferons species of 29. 154 



— mljsom? Fossil of Wasatch region 21. -530 



Zeilleb, R., cited on Honduras fos.sils 29. 608 



ZEOLITE.S, Paragenesis of the 23, 37 



Ziegleb, v.. cited on oolites 25, 761, 762, 764 



Zix^c deposits in Missouri, Genesis of 29. 86 



Zircomfekols epidosite 27, 223 



ZiRKEL, Ferdinand, cited on Ttichthofens" hypotliesis of chemical altera- 

 tion 26. 2.56 



