Another Frenchman, named Anders Celsius, devised a scale with the boiling point of water at 0° and the freezing point at 100°. In 1743 a Frenchman, named Christin, living at Lyons, France, reversed the points, and today the scale is known as the Centigrade scale, and, together with the Fahrenheit scale, is used almost exclusively wherever thermometers are required.
HOW TO CHANGE ONE SCALE INTO ANOTHER
Centigrade degrees into Fahrenheit: multiply by 9, divide the product by 5 and add 32.
Fahrenheit degrees into Centigrade: subtract 32, multiply by 5, and divide by 9.
Reaumur degrees into Fahrenheit: multiply by 9, divide by 4, and add 32.
Fahrenheit degrees into Reaumur: subtract 32, multiply by 4, and divide by 9.
Reaumur degrees into Centigrade: multiply by 5 and divide by 4.
Centigrade degrees into Reaumur: multiply by 4 and divide by 5.
WEATHER BUREAU STATIONS OF THE UNITED STATES AND WEATHER BUREAU MAPS
The following is a list of the Weather Bureau Stations of the United States, and from any of these offices, preferably the one nearest you, you will be able to obtain the weather reports and weather map (see Fig. [52]), indicating many things of interest, and from which you will be able to make a careful study of the weather.