40 



BULLETIN 105, U. S. DEPARTMENT OF AGRICULTURE. 



Experiment No. 9. — Oil asphalt — Penetration method. 



In June this section was in good condition with the exception of 

 one hole 1 J feet by 1J feet in size in the center of the road at station 

 18 + 50. This hole was repaired in the same manner as the holes in 

 section No. 5. 



This section was in good condition in December, excepting for some 

 bleeding and a slight waviness on the last 75 feet. This was, how- 

 ever, not sufficient to be noticeable to traffic. 



Table 36. — Cost data of repairs at Jamaica, N. ¥., 1913. 



Section. 



Patches. 



Carpet coat. 



Cost per 



Material. 



Labor. 



Total. 



Material. 



Labor. 



Total. 



yard. 



1 



$17. 72 

 82.55 



$4. 50 

 69.45 



S22. 22 

 152. 00 



$28. 39 



$28. 73 



$57. 17 



$0. 139 



2 



.183 



3 . . : 









.000 



4 















.000 



5.. . 



2.16 



4.93 



7.09 









.0085 



6 . . 









.000 



7 



1.26 



3.03 



4.32 



1 





.0103 











.000 



9 . . 



.16 



.51 



.67 









.0016 













SUPPLEMENTARY REPORT OF EXPERIMENTS MADE AT NEW YORK, 

 N. Y., AND RIDGEWOOD, N. J., 1910. 



OIL-CEMENT CONCRETE. 



The original report of these experiments was published hi Circular 

 No. 94, and the reports of annual inspections appeared in Circulars 

 Nos. 98 and 99. The following report covers inspections made 

 December 17 and 18, respectively. 



Experiments at New York, N. Y. 



The general condition of the surface of the road shows gradual 

 deterioration. The edges of the various cracks previously noted 

 have widened and a few minor ones have formed. A new cut has 

 been made in the center of the street from station 3 + 74 to station 

 3 + 82, and another from station 3 + 92 to station 4 + 35. The greatest 

 wear has taken place between station and station 0+15, where a 

 series of potholes has formed. Otherwise the wear has been uniform. 



Experiments at Ridgewood, N. J. 



The floor of the bridge over Saddle River has been covered with a 

 bituminous surfacing and has therefore not been subjected to wear 

 during the past year. The floor of the bridge over Hohokus River 

 was in good condition and no appreciable wear has taken place 

 since the last inspection. 



