So, I'm looking at the two charts, and Baldwin seems to suggest that which is intuitive to me. That is to say that cooking a meat in slab form should take longer than in cylinder form for each thickness of meat. On the other hand, Modernist seems to suggest that, for all but the largest sizes, cylinders should take more time. This makes no sense at all. In fact, Modernist estimates that a 15 cm diameter cylinder of 3 cm thickness would take 1:21 to cook to 55 degrees, while a slab of at least 5x length and width of the same thickness would take approx 50 minutes. But this makes no sense because the slab is at least 15x15 cm, by definition, and in that case you could inscribe the cylinder in the slab. But by doing this, by cutting off the meat and making it smaller, without changing thickness, you would increase the cooking time! That seems impossible. I am sure I am reading the whole thing incorrectly, but I would really appreciate an answer from somebody else who has puzzled over the same issue. Thanks!