Leon Battista Alberti invented the first anemometer in 1450 A.D. His invention was a disk that was perpendicular to the direction of the wind, which measured wind speed.
The type of anemometer that is common today, the cup-shaped variety, was not invented until 1846 by John Thomas Romney Robinson. He used four cups and wheels on his anemometer. The design was improved again in 1926 by John Petterson, who simplified the design to 3 cups.
Today's anemometers measure wind speed, wind pressure and wind direction. Wind speed is calculated by counting the number of times the cups on the instrument turn. They help meteorologists analyze how weather works, which assists with weather predictions.Learn More
The Internet in its current incarnation came into existence with the invention of the World Wide Web by Tim Berners-Lee in the 1990s. However, the general idea behind the Internet was already in use at that time, albeit in a much smaller way.Full Answer >
Although the exact inventor of the pencil is unknown, Conrad Gesner is often credited with the invention. In 1565, Gesner was the first to document the use of graphite placed in a wooden shaft, which was the predecessor to modern pencils.Full Answer >
The invention of the ruler dates back to ancient civilizations, such as the Greeks and Egyptians. Used to make measurements in a straight line, the first excavated rulers were often made from wood or ivory.Full Answer >
Although sundials have been used since the 8th century B.C., the first individual to be credited with the invention of a sundial is Aristarchus of Samos in about 280 B.C.Full Answer >