INDEX. 
61 
Page. 
Stannite, occurrence of 22 
composition of 40 
Sullivan, Eugene, acknowledgment to 12 
assays of ore by, report of 22, 24, 25, 28 
quoted on wet assay of tin ores 43 
Tasmania, tin deposits in 49 
Texas, tin ore in, occurrence of 45-46 
Tin, production and value of, table show- 
ing 54 
lode, occurrences of 17-29 
placer, box used in washing concen- 
trates, figure showing 34 
on Buck Creek 29-35 
on Buhner Creek 35-36 
separation of 33-34 
sluice boxes used in washing, figure 
showing 33 
Tin Creek, granite outcrop on 19 
porphyritic dike near, thin sections of. 24 
rock exposures on 19 
tin lode on, character of 19-20 
tin ore in gravels of 21 
Tin deposits, literature relating to 55-57 
Tin ore, assay of 21 
character of 16 
distribution of 16 
genesis of, reference to 16 
methods of assaying 41-43 
physical characteristics of 39-40 
polished surface of, plate showing 28 
reduction of, methods of 52-54 
Tin pyrites. See Stannite. 
Tourmaline, character and occurrence of.. 40 
Transportation, facilities for 37-38 
Tundras, definition of 29 
Tungsten, association of, with tin ores 54-55 
value of, as a by-product 54-55 
United States, tin in, consumption of 54 
tin in, occurrences of 44-46 
production of 54 
Page. 
Vegetable Creek, New South Wales, tin de- 
posits of 49 
Virginia, tin ore in, occurrence of 46 
Weed, W. H., cited on occurrence of tin in 
Texas 46 
Whitehead, Cabell, occurrence of cassiterite 
reported by 29 
Wolframite, association of, with tin ores... 54-55 
Wolframite, character and occurrence of. . . 41 
value of, as a by-product 55 
Wyoming, tin ore in, occurrence of 46 
York, settlement at, location of 10 
York, Cape, coast between Cape Prince of 
Wales and, sketch of 9 
York Creek, tin on, reported occurrence of. 36 
York Mountains, elevation and character 
of 10 
Port Clarence limestone near 12-13 
rocks of, character of 19 
topographic features of 17-18 
York Plateau, elevation of 24 
rock formations of 24 
topographic features of 10, 24 
York region, drainage of 10 
exploration and development of 10-11 
geographic position of 9-10 
geologic sketch map of 13 
gravel deposits of 14 
igneous rocks in, description of. . .• 15 
location of, outline map of Seward 
Peninsula, showing lode tin in. 8 
placer tin in, sluice boxes used in wash- 
ing, figure showing 33 
sedimentary rocks in, description of.. . 12-14 
tin in, discovery of 10-11 
distribution of 16 
summary of occurrences of 36-37 
topographic map of 12 
transportation and fuel supply in 37-39 
watershed in 10 
