INDEX. 161 



Page 



Peterson, C, Cited on character of strata at the Palisades 123 



— , Navigation of the Yukon by 124-125 



Plateau terraces along the Yukon, Description of 110 



Porcupine river, Absence of decayed rocks on 131 



, Absence of glacial records along 141 



, Ascent of, by the steamboat "Yukon " 124 



, Date of journey on 102 



, Flood-plain deposits of 120-122 



, Descent of, by McConnell 102 



, Journey stopped by low water on the 102 



, Records made by river ice on banks of 120-12: 



Port Townsend, Mention of 102 



Pyramid Mt. Peak, Unalaska, Amphitheater on north side of \ 138 



, Scenery about 139-140 



Rampart House, Navigation of the Porcupine river near 124 



Richardson, J , Reference to observations on frozen soil in North America 130 



Rink rapids, Difficulty of navigation at 125 



Russell, I. C, Discussion by 155 



Salisbury, R. D., Cited on the decay of rocks in the Mississippi valley 134 



Salmon, Possible preservation of 124 



Schwatka, F., Cited on the terraces of Lake Yukon 146 



— , Cited on volcanic dust along the Lewes 145 



— , Nomenclature of 105 



Screes or talus slopes, Descriptions of 163 



Section of flood-plain deposits along the Porcupine 122 



Sediment in the Yukon, Measurement of 116 



— of Lake Yukon 147 



Shaler, N. S., Discussion by 155 



Siberia, Depth of frozen stratum in 130 



— , Probable relation of mammoth to former glaciation in 123, 124 



— , Remarks on the glaciation of 155 



— , Visited by John Muir 137 



Sitka, Climate of 153 



Slates, Contorted, on the Yukon and Porcupine rivers lon-lio 



Snow, Absence of, on the mountains of northern Alaska 14s 



Snow line, Elevation of, in Alaska 141 



St. Elias range, Comparative size of glaciers on north and south sides of 140 



St. Michaels, Absence of decayed rocks at 134 



— , Absence of glacial records near 140 



— , Arrival at 101 



— , Character of the tundra near 120 



— , Depth of frozen stratum at 126 



— , Depth of humus layer near 127 



— , Drift-wood obtained at Ill 



"St. Paul ".Sailing of 101 



Strike of rocks along the lower Yukon 108 



Stream terraces along the Yukon 144-145 



Structure of the Yukon region 108-110 



Surveys suggested 103 



Tahk-heena river, Character of the water of 115, 116 



, Mention of 103 



, Source of the sediment of 116 



Taiya river, Migration of salmon in 124 



— valley, Fan-shaped terminal of glacier near 152 



, Glaciers on the sides of 147 



Tako arm of Tagish lake, Suggested survey of pass leading to 103 



Taku inlet, Fan-shaped terminal of glacier in 152 



, Mention of 103 



— pass, Suggested survey of 103 



Talus slopes or screes, Description of 163 



Tananah river, Character of the water of 115-116 



, Volcanic dust reported near 145 



Terraces along the Yukon, Description of 144-146 



