Vill. W. E. COOK. 
| LAPTAIN JADWIN 
4 PART OF CEMENT To 3 oF SAND & CLAY on LOAM 
TENSILE STRENLTH IM L8S PER S@. INCH : 
408 
150 
D stars 28 J MONTHS & 
with sand up to 12% producing stronger briquettes than 
standard sand, but he does not agree that soil or loam does 
the same, and he concludes that sand so adulterated is 
less desirable than clean sand. He goes on to state that 
the best mortar sand is a graded one. 
