ANALYSES OF CLAYS. 235 
to vitrification and were of a dark metallic-blue color. The bricks 
were hard and apparently durable, some of them put down in a pave- 
ment twelve years ago being still sound. In the SW. } SE. I sec. 29, 
T. 6 N., R. 20 W., J. F. Nolan burned a few bricks in 1888. The 
earth used by him is of orange color. The bed is 2 feet thick and 
extends over an area of 30 acres. The bricks burned hard and range 
in color from a dark cherry-red to a light gray. The hard-burned 
bricks are spotted with dark iron stains. The loss at this kiln 
amounted to about one-third. 
The only plant in operation in the county at the present time 
(1906) is run by William Murphy, at Dardanelle, for making common 
bricks. No further information concerning this establishment was 
obtained. 
ANALYSES OF CLAYS. 
In the table of analyses of pottery, fire, and other clays of Arkan- 
sas given on pages 236-237, certain typical clays of Ohio and Mis- 
souri are also included for purposes of comparison. 
