From Lee Angus
Ben Sewell wasn’t looking hard enough for his one-sided paper
(Feedback, 6 January).
All he had to do was find a long piece of two-sided paper, twist one
end by 180 degrees and join the two ends together.
London
Letter: Möbius like
Published 27 January 2001
Issue no. 2275 published 27 January 2001
