What is the instrument used to measure sunshine?

What is the instrument used to measure sunshine?

Measurement is performed by instruments called sunshine recorders. For the specific purpose of sunshine duration recording, Campbell–Stokes recorders are used, which use a spherical glass lens to focus the sun rays on a specially designed tape.

What states border west Virginia?

It is bordered by Virginia to the southeast, Kentucky to the southwest, Ohio to the northwest, Pennsylvania to the north (and, slightly, east), and Maryland to the northeast. West Virginia is the 41st largest by area and the 38th most populous of the 50 United States.

When were blue jeans invented?

May 20, 1873. According to the Levi Strauss website, this was the day that Levi Strauss and Jacob Davis, the innovators behind the sturdy blue jeans we all love, got a patent on the process of adding metal rivets to men’s denim work pants for the first time in history. The pants were called waist overalls until 1960 when baby boomers began calling them jeans.

Why is there braille on a drive up ATM?

Drive up ATM buttons contain braille because U.S. regulations require it. The ADA Accessibility Guidelines for Buildings and Facilities says, “Instructions and all information for use of an automated teller machine shall be made accessible to and independently usable by persons with vision impairments.”

Where do Danish pastries come from?

Although today known world-wide as “Danishes” these pastries did not originate in Denmark, but were brought to Denmark by Austrian bakers, particularly from Vienna in the 1850’s when Danish pastry workers went on a long-term wage strike.

How were microwave ovens developed?

Percy Spencer invented the first microwave oven after World War II from radar technology developed during the war. Named the “Radarange”, it was first sold in 1946.

Where did hieroglyphics develop?

The hieroglyphic system used in ancient Egypt had between 700 and 800 basic symbols, called glyphs. This number grew in the last centuries of ancient Egyptian civilization, because of an increased interest in writing religious texts.

Who invented the electric light bulb in 1879?

1879: Thomas Edison crowns 14 months of testing with an incandescent electric light bulb that lasts 13½ hours. Sir Humphry Davy had produced incandescent electric light in 1808 by passing battery current through a platinum wire. But the voltaic pile was expensive and could be messy.