BLACK  SANDS  FROM  PLACER  MINES. 
Results  of  concentration  of  black  sands — Continued. 
103 
b.  Lots  in  which  a  high  per  cent  of  gold  and  platinum  was  saved,  but  the  concentrates 
are  too  large  in  quantity  or  there  is  some  imperfection  in  the  assays  not  yet  located,  or 
both. 
Record 
num- 
ber. 
Locality  from  which  sample 
was  obtained. 
Material. 
Amount. 
Actual  value  of 
gold  and  plati- 
num in  product. 
riOOb 
P102c 
P87b 
m 
CALIFORNIA. 
Del  Norte  County:      Smith 
River. 
Coos  County:  Randolph  dis- 
trict, beach. 
Curry  County: 
Port  Orford 
Port  Orford,  beach. 
Concentrates  Nos.  1  and  2. 
Tailings 
Concentrates  Nos.  1  and  2 
Tailings,  including  No.  3  con- 
centrates. 
Concentrates  No.  1 
Tailings,  including  No.  2  con- 
centrates. 
Concentrates  Nos.  1  and  2. 
Tailings 
Pounds . 
90 
50 
165 
402 
18 
312 
37 
121.25 
Dollars. 
0.012 
.  000 
.075 
.026 
.  018 
.000 
.  033 
.00 
Per  cent. 
11.35 
.00 
18. 03 
6.29 
60.  75 
'.00 
40.  61 
c.  Lots  in  which  the  concentrates  show  values,  while  the  original  samples  failed  by  assay  to 
show  any.     The  per  cent  can  not  be  computed,  therefore. 
P65 
P89b 
P113 
P  102d 
P97 
P70 
ALASKA. 
Cape  Nome 
CALIFORNIA. 
Humboldt  County:   Gold 
Bluff. 
IDAHO. 
Ada  County:  Boise 
OREGON. 
Coos  County:  Randolph  dis- 
trict, beach. 
Curry  County:  Rogue  River, 
beach. 
Polk  County:  Falls  City. 
Concentrates  No.  1 
Tailings  and  No.  2 concentrates 
Concentrates  No.  1 
Tailings,  including  No.  2  con- 
centrates. 
Concentrates  No.  1 
Tailings,  including  No.  2  con- 
centrates. 
Concentrates  No.  1 
Tailings,  including  No.  2  con- 
centrates. 
Concentrates  No.  1 
Tailings,  including  No.  2  con- 
centrates. 
Concentrates  No.  1 
Tailings 
147.  25 
0.047 
1,941.75 
(a) 
24.5 
.038 
107 
.000 
.25 
.004 
57.  75 
.000 
4.5 
.013 
123.5 
.000 
21 
.003 
44.5 
.000 
9.5 
.  036 
124.  5 
(a) 
a  Trace. 
