Beschrijving van het nut van de grafometer, pagina 9 van 10 1777 - 1778

This 1777-1778 drawing by Antoine George Eckhardt, titled "Beschrijving van het nut van de grafometer, pagina 9 van 10" (Description of the use of the graphometer, page 9 of 10), details the technical workings and usefulness of the graphometer, a tool used to measure angles in surveying and architecture. Eckhardt was a Dutch artist born in 1740, known for his work in the field of technical drawing. The graphometer was a crucial instrument for 18th-century artists and engineers, and this detailed illustration provides a visual guide to its functions and applications in a way that would have been accessible to Eckhardt's contemporary audience. This drawing is an important artifact of the history of scientific instrumentation and technical illustration.