WEATHER BUREAU. 175 



STATION MAPS AND BULLETINS. 



The policy of discontinuing the station weather maps wherever the 

 newspapers would publish the commercial maps, adopted in 1910, 

 was continued during the past year, and has resulted in the maps 

 being published at 74 places in 132 newspapers having a total daily 

 circulation of 2,898,000. At first there was some opposition to the 

 commercial map, but this gradually subsided as the vast enlargement 

 of the service thus rendered through the newspapers came to be 

 recognized. A few comparisons of the distribution obtained through 

 the press with that possible through the maps issued at the stations 

 are sufficiently convincing on tliis point. New York issues daily 

 1,013 weather maps as compared to 191,000 commercial maps; 

 Chicago, daily weather maps 1,171, commercial maps 507,449; Phiia- 

 delpliia, daily weather maps 375, commercial maps 140,000. While 

 the pubhcation of the commercial maps has been substituted at 54 

 stations, the daily weather maps are still printed at 58 stations, the 

 total daily issue being 15,000. 



DaOy weather bulletins (Form No. 1038) were published at 9 

 stations, the daily issue being 467. 



Glass weather maps are changed daily at 42 stations, having a total 

 number of 53 maps. These maps are displayed at boards of trade, 

 cotton exchanges, maritime exchanges, at the stations proper, in the 

 Wasliington Terminal Railroad Station, and in the Senate and the 

 House of Representatives, in Washington, D. C. 



MARINE WORK. 



The field covered by this section of the bureau's activities includes 

 the meteorological work of the principal oceans of the world and of 

 the Great Lakes of the United States, the supervision of the wireless 

 telegraph weather service, and the work of the vessel-reporting service. 



METEOROLOGICAL CHARTS. 



The meteorological work consists in the collection, compilation, and 

 study of ocean and lake meteorological data, and the publication and 

 distribution of the data thus obtained, by means of the marine 

 meteorological charts of the Weather Bureau, which are distributed 

 to mariners, maritime exchanges, and meteorological institutions 

 throughout the w^orld. The meteorological information collected in 

 this manner is also furnished to the Hydrographic Office of the Navy 

 Department, and forms the essential features of the Pilot Charts 

 published and distributed by that office. 



The publication of a series of monthly charts for the Indian Ocean 

 and the Great Lakes will be completed mth the issue for December, 

 1911, and with the others will constitute the first complete set of 

 meteorological charts covering the principal oceans of the world and 

 the Great Lakes of the United States. 



The charts for the North Atlantic, North Pacific, and Indian Oceans 

 and for the Great Lakes are published monthly, and those for the 

 South Atlantic and South Pacific Oceans quarterly. They are mailed 

 40 days in advance of the month or quarter for which the chart is an 

 issue. 



