Hunh? It's just an allusion to non-Euclidean geometry and the Gauss-Bonnet theorem, which prevents any Cartesian grid system from working on the sphere.
Yes, that is the surface meaning, but it seems to me there must be a secondary one. Daniel's tirade in the previous comment is not just saying "we will be able to draw accurate maps using a Cartesian grid" (otherwise, why say "that will be the end of Alchemy"? what does that literal meaning have to do with alchemy?). Notice that he is responding there to Root's assertion that there is little contrast between alchemy and "the younger and more vigorous order of knowledge that is associated with your club", i.e. modern science (t...
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