ABSTRACT
This paper contains what is, in my view, a good discussion of the main ways in which models are used in physics, along with an analysis of the principal points tending to lead to disagreement among physicists concerning the significance of such models. In these comments, I should like to go further, and to indicate some of the ways in which our thinking goes beyond the notion of a model. I hope thereby to give some further notion of what may be the limitations in the use of models, as well as of the advantages that models confer in situations in which they are appropriate.
