Heavy Construction
The Allen and Greenough is still under construction;
so some links may not work quite the way you would expect.
 
 
 
 
Genitive of Material.
 
344.
 The Genitive may denote the Substance or
Material of which a thing consists (cf. § 403): -  
-  talentum auri, a talent of
gold.   
- flumina lactis, rivers of
milk.
 
 
 
