66 



THE TESTING OF ROAD MATERIALS. 



TAHI.K I> (PART II) .Percentage of 



[The small numerals placed above the percentage figures denote, respectively, whether the mineral 

 po-ed.and t lie secondary those resulting from subsequent Change. In sonic cases the separate deter- 

 t\vo is inven in one column and an asterisk or dagger indicates the other mineral.] 



