Using a quadrant with a plumb bob to calculate the height of a tower by triangulation. From Sebastian Munster "Rudimenta Mathematica", Basle 1551. Woodcut

- Image ID: HTMKR7
Using a quadrant with a plumb bob to calculate the height of a tower by triangulation. From Sebastian Munster "Rudimenta Mathematica", Basle 1551. Woodcut
Photo 12 / Alamy Stock Photo
Image ID: HTMKR7