What metaphors are used in Flaubert's Parrot by Julian Barnes?

Example of Metaphor:

"You can define a net in one of two ways, depending on your point of view. Normally, you would say that it is a meshed instrument designed to catch fish. But you could, with no great injury to logic, reverse the image and define a net as a jocular lexicographer once did: he called it a collection of holes tied together with string."