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P. 140
numbered, only alternate pages, or leaves).
In his sixth book he discusses the incli-
nation of the planetary orbits to the eclip-
tic. In regard to this the theory of Coper-
nicus is unique; and it will be best to ex-
plain this in the words of Grant in his great
work.[8] He says:–
Copernicus, as we have already remarked,
did not attack the principle of the epicycli-
140
