A bequeaths to B "ten bushels of the corn which shall grow in my field of Green Acre". How is this…

Illustration (ii) to section 150 treats this gift as demonstrative. Under section 150 a legacy of a certain quantity of a commodity that refers to a particular fund or stock as the primary source of payment is demonstrative. B is given a quantity of corn to come out of the produce of Green Acre, not a specified part of A's property.