What are key rhetorical devices or techniques used by Old Major in his speech?

I think that one of the most critical rhetorical devices
that Old Major uses is the connection with his audience.  Old Major specifically speaks
to the animals in a manner that makes relevant his ideas. For example, he specifically
refers to Boxer being taken to the Knacker's.  This is something that is a fear for
animals like Boxer, and in doing so, Old Major is able to directly connect what he is
saying to the audience listening.  Another rhetorical device is that Old Major offers a
contrast between what is and what can be.  This parallel provides a sense of hope to the
animals, and allows for a sense of inspiration to be present.  Old Major's inspirational
quality is something that enables him to be able to reach the animals in a way that
allows them to see what can be.  This is seen particularly in the pigs, who sit in the
front and pay attention to what is being said.  Old Major's stress about his own age is
another rhetorical device that helps to bring out his ideas to the audience.  His
fundamental argument is that none of what he says is for his benefit, as he is going to
be moving on soon enough.  Rather, he speaks for the animals and those who will come
after him.  In this, he is able to provide another connection of meaning to his
audience.