Yes, it is a "classic", and actually the linked to online version (with the illustrations) is (besides being not complete) somehow much worse (IMHO) than the original, which is a very plain booklet where the cartesian diagrams are less distracting, here it is (from archive.org), the PDF is an actual scan of the booklet:
You're probably right about that; such framing has a huge effect on how a text is perceived. But I think in this case having a normal web page might be more important.
[1] https://en.wikipedia.org/wiki/Carlo_M._Cipolla