Bill Skaggs wrote:>[...]
> The distinction I had in mind is that butterflies are a product of
> nature, and collecting them can be a first step toward uncovering the
> regularities of nature (which I think is what Rutherford meant by
> "physics"), whereas stamps are a product of human bureaucracies and
> collecting them is not a first step toward anything particularly
> interesting, as far as I can see.