Drawing instruments have been essential to mathematics, architecture, surveying, navigation, engineering design, and other technical endeavors from antiquity through the 20th century, although ...

When drawing this cross-section diagram, it’s important to take great care so that no tubes are blocked off that should be open. Some instruments like rulers have two scales on. It is important ...

Drawing instruments have been essential to mathematics, architecture, surveying, navigation, engineering design, and other technical endeavors from antiquity through the 20th century, although ...