64 BULLETIN 586, U. S. DEPABTMEXT 0~E AGBICULTUBE. 
Se :5 — Crusher run passing a f-ineh circular opening includ- 
ing dust of fracture; f-ineh stone, passing li-ineh circular opening 
and retained on f-inch opening; 1%-inch stone, passing 2i-inch cir- 
cular opening and retained on li-inch opening: %-incn stone screen- 
ings from which dust had been removed. 
Traffic census for 11 days in 1911 showed a maximum of 2.794 
vehicles per day of 24 hours, a m inim um of 655 vehicles per day of 
24 hours, an average of 1.493 vehicles per day of 24 hours. 
Table 67 indicates the method of construction of the experimental 
sections and shows their condition at the time of several inspections 
since construction. The tabulation shown has been prepared from 
detail reports of inspection and published in Circulars Xos. 9S and 
99. Office of Public Roads, and in Bulletins Xos. 105, 257, and 407. 
U. 5. Department of Agriculture. 
