THE NEW COSMOLOGY--COPERNICUS TO KEPLER AND GALILEO (1) (p.
62).
Copernicus, uber die Kreisbewegungen der Welfkorper, trans. from Dannemann's Geschichle du Naturwissenschaften, 2 vols., Leipzig, 1896. (2) (p.
90).
Galileo, Dialogo dei due Massimi Systemi del Mondo, trans. from Dannemann, op.