SAMPLING AND TESTING HIGHWAY MATERIALS. 
91 
a 
^ 
.2 
pQ 
75 
crt 
+~ 
a 
^ 
T3 
s 
I— 1 
c/l 
ft 
P3 
'cS 
'a 
a> 
CS 
c 
w 
a> 
w 
o 
c 
ft 
1 
O 
Pi 
