CLARKE.] 
CLAYS AND SOILS. 
MARYLAND. 
353 
Clays from the Matawan formation, received from W. B. Clark. 
Analyses by George Steiger, record No. 1684. 
A. Below Barnard's wharf, near Betterton, Kent County. 
B. Severn River, below Round Bay, Anne Arundel County. 
C. Magothy River, near Wilson's wharf, Anne Arundel County. 
D. Fort Washington Bluff. 
sio 2 :... 
A1 2 (V 
FeA 
MgO 
CaO 
Na 2 
K 2 
H 2 0at 100°... 
H 2 above 100 
S0 3 
73.47 
12.69 
4.62 
.59 
.15 
.09 
1.55 
.89 
3.85 
.19 
98.09 
B. 
87.15 
6.46 
2. 15 
.27 
.10 
.14 
.90 
.32 
1.90 
none 
99.39 
C. 
82. 86. 
6.49 
3.54 
.52 
.29 
\16 
1.16 
.69 
2.24 
.21 
98.16 
i'. 
73.02 
10.00 
4.78 
.90 
.57 
.59 
1. 92 
1. 09 
3.07 
1.04 
96.98 
a Titanic and phosphoric oxides not separated. 
No carbonates present. Sulphides undetermined. 
Bull. 228—04 23 
