Exibit Labels Aidan Brady

Kahlisco Coilmeter Pyranometer

Kahl Scientific Instrument Corporation; El Cajon, CA

1940s-50s

This device measures the amount of solar radiation. Most pyranometers, such as this one, do not need electricity to function.

Hygrothermograph

Weather Measure Corporation; Sacramento, CA

1960s-70e

This device measures relative humidity and temperature. Many of these instruments use a single strand of human hair to detect the humidity and a metal strip to detect temperature.

Barograph

Taylor Instrument Company; Rochester, NY

1920s

This device measures barometric pressure. By changing the gears the user can change the length of a single measurement. This one measures in a 7 day cycle. The first barograph was invented in the 1760s by a clock maker.