The cherubim in the top illustration experiment with magnets and metal objects, such as keys and rings. The cherubim in the bottom illustration experiment with magnets and knives. The two angels in the middle magnetize the knives they are holding,…
Kepler describes the alignment of the platonic solids in the solar system. The four illustrations depict flattened views from within the octahedron looking out. The horizontal line is the square bisecting the octahedron, and the other lines show the…
Illustration of nested regular solids, depicting Kepler's model of the solar system. Saturn's orbit circumscribes the cube, Jupiter's orbit the tetrahedron, Mars' orbit the dodecahedron, Earth's orbit the icosahedron, and Venus' orbit the octahedron.…
An illustration of the human arm holding a weight. The illustration includes the arm's range of motion. Above and below the arm are two Bible verses in Hebrew, with Psalm 139:14-15 below and Job 10:2 above
An opening of A Prognostication for euer. The page on the left provides a rule for determining the beginning and endings of the Hilary, Easter, Trinity, and Michaelmas terms. The page on the right provides a table for determining "how long the Moon…