Beschrijving van het nut van de grafometer, pagina 6 van 10 1777 - 1778

This is a page from a 1777-1778 manual describing the "general Graphometer" created by Antoine George Eckhardt (1740-1810). The Graphometer is a unique measuring tool that is different from other similar devices because of its smooth and precise movement, minimizing friction and allowing for a more accurate reading of angles. The text highlights the superior accuracy of the Graphometer when compared to other tools, noting its ability to measure angles in various planes and its application in different fields such as drawing and perspective.