An examination of the results of the above stated ten samples 

 recently sent on for analysis at the station shows the following vari- 

 ation in their composition : 



The average of Calcium oxide (lime) amounts to 33.11 per cent., 

 varying from 24.06 to 40.04 per cent, in different samples. 



Mineral matter (coal ash, sand,) insoluble in diluted hydrochloric 

 acid : 



Below 5% 1 



From 5 to 10% 2 



" 10 to 15% 5 



" 15 to 20% 2 



