Circular S 



W. B. No. 1249 



U. S. DEPARTMENT OF AGRICULTURE 



WEATHER BUREAU 



CODES FOR CLOUD FORMS 

 AND STATES OF THE SKY 



ACCORDING TO THE 



INTERNATIONAL SYSTEM OF 



CLASSIFICATION 



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Prepared by the 

 Weather Bureau Committee on Clouds and Cloud Forms: 



Ivan R. Tannehill, Chairman 

 Horace R. Byers 

 Edgar B. Calvert 



Benjamin C. Kadel 

 Joseph B. Kincer 

 Richmond T. Zoch 



united states 



government printing office 



washington: 1938 



For sale by the Superintendent of Documents, Washington, D. C. ------- Price 15 cents 



