Books on Amazon
Essence/Nature/Locke/Arndt: only in the language itself the objectivity of our general knowledge is constituted - that is the "nominal essence".
Real being: a real but unknown nature of insensible parts.
That we call "cause" or basis of our complex idea.
There is no other measure of the essence or the specific, as our abstract ideas.
What assigns each particular to a class or a generic name (general term).
An Essay Concerning Human Understanding