l6o EXPERIMENTS IN ROAD SURFACING 



We ought to have a clear idea of the effect of each such appli- 

 cation before undertaking its use. 



SUMMARY 



The most important results of the above experiments and 

 observations may be summed up in four sentences : 



1. Country towns should do more surfacing, using the best 

 materials available. 



2. Sand should be removed from the gravel employed and 

 all gravel should be as uniform as possible. 



3. Labor-saving machinery should be utilized to reduce 

 expense. 



4. Combinations of natural materials should be tried when 

 the conditions are favorable. 



