Clinometer
The clinometer also called an inclinometer is part of a group of instruments that can be used to measure angles. In contrast, the clinometer is used mainly 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 was a sophisticated tool that included such things as bubble levels, sights, and telescopes. A well-known clinometer is the Abney level. Invented by William Abney before 1880, it consisted of a small telescope, a semicircle divided into a degree, and a bubble tube.