62 ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE. 



MARINE OBSERVATIONS. 



The publication of the monthly summaries of weather conditions 

 over the north Atlantic Ocean in the Weather Review, together with 

 charts showing the averages of pressure and temperature, the pre- 

 vailing direction of the winds, and the paths of the more important 

 storms, begun during the early part of the j^ear, has continued. 



ATLAS. 



Substantial progress was made during the year in the preparation 

 of material for the Weather Bureau portion of the proposed Atlas of 

 American Agriculture. Many of the more important charts have 

 been prepared and are now in the hands of the draftsman for reduc- 

 tion to the final base size to be adopted, and it is expected the work 

 will be very generally completed during the present fiscal year. 

 Much work has been required of station officials in preparing the 

 material for these charts, but this has resulted in the bringing to- 

 gether of a large volume of valuable material not previously sum- 

 marized at stations. 



ATMOSPHERIC MOISTURE. 



Much material has been gathered in preparation of a report on 

 the vapor pressure and relative humidity of the United States which 

 it is hoped can be completed and published in the near future. 



STUDY ON ANTICYCLONES OF THE UNITED STATES. 



A study by Mr. E. H. Bowie and Mr. R. H. Weightman on the 

 anticyclones of the United States and their average movements is 

 nearing completion, and the manuscript has been submitted for 

 publication. 



TREATISE ON WEATHER FORECASTING. 



A board consisting of Profs. A. J. Henry (chairman), H. J. Cox, 

 and H. C. Frankenfield, and Mr. E. H. Bowie, have been engaged 

 during the last year or so upon the preparation of a treatise or 

 manual on weather forecasting in the United States. This important 

 subject has never received the treatment that its importance de- 

 serves. Weather forecasts under governmental auspices have been 

 made continuously for about 45 years, yet only fragmentary and 

 scattered references to the general principles of the art have ap- 

 peared in print. The manuscript and the illustrations were com- 

 pleted during the year and the matter is now in type, forming a 

 printed volume of 370 royal octavo pages with 199 illustrations. 



SUPPLEMENT. 



A collection of phenological and meteorological observations at 

 Wauseon, Ohio, mentioned in the report for last year, was issued as 

 Supplement No. 2 on September 4, 1915. 



