40 BULLETIN 257, U. S. DEPARTMENT OF AGRICULTURE. 
blade was tough and pliable. “The section will not require repairs to. 
keep it in serviceable condition, but should the other sections be re- 
constructed the depressions in this section ought to be brought to 
erade. 
SUPPLEMENTARY REPORT OF EXPERIMENTS MADE AT YOUNGSTOWN, 
OHIO, 1909. 
SLAG, SLAG AND LIME, SLAG AND WASTE SULPHITE LIQUOR PREPARATION, AND SLAG 
AND TAR. 
The original report of these experiments was published in Circular 
No. 92, and reports of annual inspections were given in Circulars Nos. 
94, 98, and 99, Office of Public Roads, and U.S. Department of Agri- 
culture Bulletin No. 105. The following report covers an inspection 
made October 26, 1914, after a period of about 10 days’ rain: 
Section No. 1 (Biast-FurNAcE Sage). 
A length of approximately 65.feet of this section, beginning at the 
south curb of Mahoning Avenue, has been surfaced with a bituminous 
paving material and serves as an intersection apron to that avenue. 
Beyond the end of this pavement the section has not been disturbed, 
and it is in generally good condition. The ruts have become well de- 
fined, but they are shallow and wide, except for three depressions 
about 30 inches long in the west rut. In these depressions the binder 
has disappeared from the surface interstices of the stone of the wear- 
ing course, but the stones do not appear to have been loosened. The 
surface is otherwise smooth, uniformly worn, and free from large 
protruding stones. 3 : 
Section No. 2 (Buast-FurNaAcE Siac anp Jame). 
Wide shallow ruts extend the entire length of the section, and a 
few large stones about 3 inches in diameter protrude about one-half 
inch above the general surface. Aside from these, the section has a 
clean-cut appearance and does not appear badly worn. | 
Section No. 3 (Biast-FuRNACE SLAG AND WASTE SuLPHITE Liquor PREPARATION). 
The ruts referred to in the two preceding sections continue un- 
broken to the top of the slight grade near the middle of section No. 
3, and there is no noteworthy difference in appearance between this 
and the preceding section. About the same number of large pieces 
oi slag protrude from a unit of area, and there is no visible difference 
in wear. From the middle of the section down the grade to the be- 
ginning of section No. 4, neither the ruts nor the protruding stone 
are aS pronounced as in the north half of the section. 
