Article date: Dec 1971
Article title: Further encounters with touching cubes, and the paradoxes of Zeno as "supertasks"
Mathematical Games column? Y
Book: 10. Wheels, Life, and Other Mathematical Amusements
Chapter: 13. Salmon on Austin's Dog
This data confirmed? yes
Notes
Peter Rowlett (30 October 2023):
I have seen this chapter and column side-by-side and they match, though the start of the article (the "touching cubes" bit) is in the addendum to chapter 8 instead.