RESULTS AFTER TWO YEARS 1 53 



cohesion, and consequently durability Evidently, for a sim- 

 ilar reason, section i has stood up somewhat better than sec- 

 tion 2, which contains more sand ; also section 7 than 

 section 3. 



Again, wherever, as in sections 1, 2, 3, 4, 5, 7, and 9, 

 water-worn gravel was used, which contained more or less 

 large stones, the coarse material not being screened out in any 

 of these cases, many of these have bedded near the surface, 

 and the finer material has worn away, leaving the stones pro- 

 jecting to some extent. This makes the surface uneven and 

 jolty to ride over. The general appearance is that of a 

 macadamized road which has worn down so that it needs 

 resurfticing. If, however, the larger stones had been kept 

 out, or if they had been put in as a separate lower hner and 

 rolled in place, the surface would have kept smooth some 

 years longer. Section 9, where the gravel was sorted, and 

 the coarser material placed at the bottom, is noticeably better 

 than the others in this respect, but as it was not rolled there 

 was more or less mixing of the different layers during con- 

 solidation. Section 8b remains smooth to-day, and, with the 

 exception of No. 12, is in by far the best condition of all. 



Sections 4 and 5, which were remarkably smooth the first 

 year, are now worn ffat, and need resurfacing. The material 

 used upon these sections was finer than that upon most of the 

 others, as already noted, hence its less durability. For the 

 same reason the few large stones contained project promi- 

 nently, and render the present surface unusually rough. 



Section 6a was noticeably harder and smoother than section 

 6b, for the first year, though slightly more muddy in the 

 spring. There was no great depth of mud in either case, 

 however. 



Section 10 has made a fair road, but not as hard or dura- 

 ble as several others. It may be placed, in order of dura- 

 bility, between the coarse and fine graveled sections alread}^ 

 described. 



Section 12 is the best of all, and stands up to-day almost as 

 well as when first laid. The section was too short for best 

 effect, and the material has been pushed either way to some 

 extent upon the poorer sections adjacent. Section 8b is the 



