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original: "Weeghconst." Stevin coined this term from "wegen" (to weigh) and "const" (art/science). It was his Dutch equivalent for the Greek term 'Statics.'
An ornate oval frame features two winged cherubs at the top and decorative scrolls. Inside the oval is a scientific diagram of the "wreath of spheres" original: "clootcrans", depicting a chain of fourteen spheres draped over a triangle to demonstrate the law of equilibrium on an inclined plane. Above the diagram, a curved banner contains the motto: "What appears a wonder is no wonder" original: "WONDER EN IS GHEEN WONDER". This motto reflects Stevin's belief that anything seemingly miraculous has a rational, scientific explanation. At the base of the frame are the initials "A" and "V."
Plantin was one of the most famous printers of the Renaissance; he established this branch in Leiden specifically to serve the university there.
Raphelengius was Plantin's son-in-law and a scholar of Oriental languages who managed the Leiden press.
original: "CIƆ. IƆ. LXXXVI." This uses an older form of Roman numerals where "CIƆ" represents 1000 and "IƆ" represents 500.