lxXli INTRODUCTION. 



edition by the librarian of the United States Weather Bureau, and repre- 

 sents current practice in the use of the symbols approved by the Interna- 

 tional Meteorological Organization. For further information on the sub- 

 ject of meteorological symbols, see Monthly Weather Review (Wash., D.C.), 

 May, 1916, pp. 265-274. 



Table 105. International cloud classification. 



The text under this heading is condensed from the International Cloud 

 Atlas, 2d edition, Paris, 1910. 



Table \ 06. Beaufort weather notation. 



This table has been revised in the library of the United States Weather 

 Bureau, and represents the current practice of American and British ob- 

 servers in the use of the Beaufort letters. 



Table 1 07. List of meteorological stations. 



This list has been extensively revised in the library of the Weather 

 Bureau, and has been enlarged to include all the stations for which data 

 appear in the "Reseau Mondial" of the British Meteorological Office for 

 1912 (published 1917). The stations of the Reseau Mondial were selected 

 to represent, so far as available data permitted, the meteorology of all land 

 areas of the globe, on the basis of two, or in some cases three, stations for 

 each ten-degree square of latitude and longitude. 



No attempt has been made in this edition of the Smithsonian Tables 

 to indicate the "order" of the several stations, according to the definitions 

 adopted at the Vienna Congress of 1873; as, owing to the present wide- 

 spread use of self-recording instruments, the old distinction between first 

 and second order stations has lost much of its importance. 



Several stations included in the list are no longer in operation. Data 

 concerning the locations and altitudes of these stations are still valuable, 

 in view of the frequent use made of their records in meteorological and cli- 

 matological studies. 



In general, the spellings of names are those most frequently met with 

 in existing compilations of meteorological data, without regard to the 

 practice of English-speaking countries. In a majority of cases the native 

 orthography has been followed. 





