19th century Clinometer / Clinomètre du 19ième siècle

(Le français suit l'anglais)

The clinometer, also called an inclinometer (or in surveying, an Abney level) is used to measure angles on land. This information can then be used to determine such things as the incline of slopes and the height of mountains, trees and even clouds. Clinometers have been around for a long time. They initially began as a simple plummet tool (a string with a weight at the end of it), but by the end of the 18th century it became a more sophisticated tool that include