AN INTRODUCTION TO METEOROLOGY 



Descriptive Meteorology 



By Willis L. Moore, LL.D., Sc.D., Professor of 

 Meteorology and Chief of United States Weather 

 Bureau; President of National Geographic Society. 

 Many maps and illustrations. 8vo. Cloth, $3.00, net. 



The object of the author in writing this book was to pro- 

 vide, as far as possible, the young men entering the service 

 of the United States Weather Bureau with a comprehensive, 

 up-to-date introduction to modern meteorology. But to meet 

 their needs in this particular is to provide equally well for all 

 others who are beginning seriously this important science. 



An effort has been made to show the pracdcal uses to 

 which this science is being put every day, and, by means of 

 thorough explanation, definition and illustration, to render 

 the book of the greatest help to the largest number. 



In carrying out the i^lan adopted for the book many new 

 features have been introduced. Among the more important 

 of these are, specifically : 



1. A discussion of astronomical climate. 



2. A graphical representation of the relative proportions, at vari- 

 ous elevations, of all the important gases of the atmosphere. 



3. A discussion of the movements of the air at various elevations 

 in cyclones and anticyclones. 



4. A discussion of the vertical distribution of temperature during 

 different seasons and different weather conditions. 



5. An account of the isothermal layer. 



6. A discussion of the importance of dust particles in the air to 

 the widely different phenomena of sky light, by which we get indirect 

 illumination, and condensation that precedes and leads to precipitation. 



7. A general introduction through the science of meteorology to 

 the art of weather forecasting, profusely illustrated by charts trom 

 actual observations. This chapter is so written that a study of it will 

 enable the layman, by the aid of a daily weather map, to make a good 

 forecast of the coming weather for two or three days ahead. 



D . A P P L E T O N AND COMPANY 



NEW YORK CHICAGO 



474e 



