rURlNGTON.] 
CLASSIFICATION OF ALLUVIAL DEPOSITS. 
Classes of deposits worked in districts visited — Continued. 
29 
Province. 
District. 
< lias of placer worked. 
Seward Peninsula 
Nome 
Creek, hillside, bench, gravel plain, and 
seabeach placers. 
Creek, hillside, and river bar placers. 
Creek and river bar placers. 
Council 
Solomon 
In the districts not visited the classes of deposits are as follows 
Classes of deposits 'worked in districts not visited. 
Province. 
District. 
Class of deposit worked. 
South Coast 
Porcupine 
Nizina 
Creek and bench placers. 
Do. 
Chisna 
Creek placers. 
Do. 
Sunrise 
Interior 
Fortymile 
Rampart 
Creek and bench placers. 
Do. 
Seward Peninsula 
Topkok 
Port Clarence ... 
Fairhaven 
Creek, gravel plain, and seabeach pla- 
cers. 
Creek and bench placers. 
Do. 
Kougarok 
Do. 
METHODS OF MINING, AND CONDITIONS. 
The mining of placer gold in Alaska is carried en for the most part 
during June, July, August, and September. The gold-bearing gravel 
mined during the remainder of the year by winter drifting does not 
exceed 15 per cent of the total annual amount extracted. The gold can 
not be washed from this gravel until the cessation of winter conditions 
liberates the water in spring for sluicing purposes. The sluicing of 
the "winter dumps" takes place during the latter part of May. 
Many of the methods of mining have been developed within the last 
ten years to suit the unusual conditions existing in the northern gold 
fields. Gravel miners from other parts of the world found that in 
Alaska much of their previous experience proved of no special benefit. 
On the other hand, men without previous experience in mining, but 
possessing ingenuity, have occasionally adopted devices which have 
proved efficient and adequate to meet the northern conditions. 
Methods which had been condemned or tried with ill success in other 
bountries have given good results in Alaska, while the attempts to 
apply hydraulic or mechanical methods of established reputation else- 
where have frequently resulted in ignominious failure. 
