ILLUSTRATIONS. 
Page. 
Plate I. Rock-cut on Miocene ditch line, Seward Peninsula 13 
II. General map showing area traversed 14 
III. A, Churn drill mounted on scow, Snake River; B, Winter dumps, 
Klondike 40 
IV. A, Set-up of boxes for shoveling-in, American Creek; B, China 
pump, Klondike 56 
V. A, Yukon placer miner; B, Dam for booming, American Creek... 58 
VI. A, Steam scraping on Walker Fork, Alaska; B, Dumping to sluices, 
Klondike -. 62 
VII. A, Derricking at Fairbanks, dumping; B, Derricking at Fairbanks, 
loading 64 
VIII. A, Skids for derricking; B, Derrick bucket 66 
IX. A, Dumping bucket; B, Rough bed rock and bowlders piled in 
pit 68 
X. Plan of derricking plant, Ophir Creek, Seward Peninsula 70 
XI. A, Steam shovel, Anvil Creek; B, Steam shovel, Bear Creek, Klon- 
dike 74 
XII. A, Stationary washing plant, Klondike; B, Cocoa matting and ex- 
panded metal riffle 80 
XIII. A, Adit to drifting operations; B, Thawing ahead of shovel, Eldo- 
rado Creek 84 
XIV. A, Old drift timbers in hydraulic pit, Klondike; B, Application of 
the steam point in open-cut work 86 
XV. A, Drift mining on Fairbanks Creek; B, Hydraulicking, Silver 
Bow basin 92 
XVI. A, Topography, South Coast province; B, Treadwell ditch line at 
Lawson Creek, Douglas Island 114 
X VII. A, Pressure box in Treadwell ditch; B, Method of staying pressure 
box, Silver Bow basin 116 
XVIII. A, Flume of Jualpa Mining Company, Silver Bow basin; />', Typical 
South Coast topography, Gold Creek 118 
XIX. A, Typical interior topography, Mastodon Creek, Birch Creek dis- 
trict; B, Ditch building, head of Nome River, Seward Peninsula. 120 
XX. A, Miocene ditch, Glacier Creek; B, Flume of Hot Air Company, 
Ophir Creek 1 24 
XXI. A, Pier for trestle, Hot Air ditch line, Ophir Creek; B, Small stor- 
age dam, Bonanza Creek, Klondike 1 26 
XXII. A, Settling pond, Anvil Creek, Seward Peninsula; B, Pipe Yun\ 
Pine Creek, Atlin, British Columbia 128 
XXIII. A, Set-up of hydraulic pipe line, McKee Creek, Atlin, British 
Columbia; B, Hydraulic pit, Klondike benches 132 
5 
