1877. | 
265 
{ Lesley. 
The percentage of Carbonate of tron in these beds runs thus in the 
samples taken at railway grade: ......... 
406 
044 
203 
460 
063 
A779 
B04 
.058 
015 
.682 
189 
110 
2.422 
1.438 
914 
.073 
123 
1.189 
885 
218 
208 
.073 
151 
290 
658 
617 
By f43) 
O19 
.058 
087 
.696 
.080 
.058 
.638 
566 
029 
3892 
058 - 
479 
040 
008 
102 
450 
174 
219 
725 
1.510 
and the samples at the top exhibit about the same variations within the 
same limits, bed 16 showing 1.044; bed 39, 1.994 ; bed 41, 1.528; bed 44, 
1.5387 ; bed 46, 1.552, and all the rest falling below one per cent. 
The percentage of Alumina is extremely low, being nil in many of the 
beds, and .002 .020 .080 .180, rising in four instances to .800 .350 .479 
and .600 in the first set of samples, and to .390 in one instance in the other 
set. 
The percentage of Sulphur in the first set of samples taken from the 
bottom of the cuttings is as follows:.... 
119 
028 
040 
-016 
176 
048 
O71 
096 
070 
089 
095 
-095 
695 
133 
115 
.096 
050 
042 
.088 
089 
081 
-130 
-059 
075 
048 
-052 
034 
O76 
065 
128 
141 
.092 
-050 
-058 
027 
025 
.069 
150 
051 
035 
044 
O76 
.018 
.106 
O17 
080 
072 
O71 
and in the second set keeps about the same range, but never exceeds .200 
except in the third (2.50), twenty-seventh (.222), forty-fifth (.3807), and 
thirty-third (.438) beds. 
.trace 
.014 
.0038 
.trace 
-none 
-none 
.003 
The percentage of Phosphorus in the first set is as follows: ............ 
.006 .008 .003 .013 .006 
.trace .none .008 trace .006 
-006 O15 .008 .003 .trace 
O11 006 .006 .trace .trace 
. trace . trace . trace -none -none 
.010 -none .-none .005 -none 
-none none -none .018 -none 
.006 .trace 004 O11 .trace 
. trace 
the highest being .018.—In the second set three go up to .010, two 
others to .013, one to .015, one to .017, and one as high as .061. 
PROC. AMER. PHILOS. soc, xvitT. 100. 24a. 
PRINTED FEB. 2, 1878. 
