[116] Delambre: Astr. Mod., p. xi.

[117] Snyder: 165.

[118] Copernicus: Dedication, 3.

[119] Prowe: II, 362-7.

[120] Ibid: II, 406.

[121] Ibid: II, 501.

[122] Ibid: II, 517-20.

[123] Four other editions have since appeared; at Basel, 1566, Amsterdam 1617, Warsaw 1847, and Thorn 1873. For further details, see Prowe: II, 543-7, and Thorn edition pp. xii-xx. The edition cited in this study is the Thorn one of 1873.

[124] Prowe: II, 553-4.

[125] Copernicus: De Revolutionibus, I. "To the reader on the hypotheses of this book."