Weather

This document describes various instruments used to measure weather conditions and elements. It discusses anemometers and wind vanes for measuring wind speed and direction, barometers for atmospheric pressure, rain gauges for rainfall amounts, thermometers for temperature, and hygrometers and psychrometers for humidity. Other instruments mentioned include ceilometers, evaporation pans, thermohygrographs, Stevenson screens, and Campbell-Strokes sunburn tracers. The document provides brief descriptions of each instrument and how it is used to collect weather data.