 The first philosophical work of Thomas Hobbes, which remained unpublished until 1973, was on the "De mundo dialogi tres" of White, written in 1642.The "Institutionum peripateticarum" (1646, English translation "Peripatetical Institutions", 1656) represented itself as an exposition of the 'peripatetic philosophy' of Kenelm Digby.It was a scientific work, showing acceptance of the motion of the Earth and ideas of Galileo, but disagreeing with him on the cause of the tides.