Page 651: A Universal Cellular Automaton
Details of how the universal cellular automaton emulates rule 30
Details of how the universal cellular automaton emulates rule 30 2
Details of how the universal cellular automaton emulates rule 30. Once again, the only difference in initial conditions from the facing page is that each block now encodes rule 30 instead of rule 90.

From Stephen Wolfram: A New Kind of Science [citation]