"...Meteorology the science of the atmosphere is thus of very great interest and importance. There is no subject a knowledge of which does more to make our daily life interesting. Since we live in the midst of the atmosphere and cannot escape from the changes that take place in it we must consciously or unconsciously become observers of these changes. Examples of the varying processes at work in the atmosphere are always with us. There is no end to the number and the variety of our illustrations of these processes. Man is so profoundly affected by weather changes from day to day that all civilized countries have established weather services. Observers taking regular weather records are stationed at thousands of different places in all parts of the world and the observations which they make are used by meteorologists in preparing daily weather maps and forecasts and in studying the conditions of temperature winds and rainfall. In the United States alone there are about 3000 of these observers..."