Fragment 19 and Text

Hewlett-Packard’s digital surface imaging involves Polynomial Texture Mapping to produce beautiful interactive images showing fine surface details. Fragment 19 is part of the front cover of the Mechanism and contains numbers (highlighted in red) relating to three critical cycles of the Solar System: ‘76 years’ refers to the Callippic cycle, ’19 years’ to the Metonic cycle; and ‘223’ to the Saros cycle.