60 ANNUAL EEPOETS OF DEPARTMENT OF AGRICULTURE. 



Annual Report of the Chief of the Weather Bureau, 1915-16. 282 pages, 

 charts. January, 1917. Gov. Print. Office. 



Description of Cloud Forms ; revised edition. 1 sheet, illus. January, 1917. 

 Weather Bureau Print. 



Types of Anticyclones of the United States and Their Average Movements. 

 25 pages, illus., charts. Supplement No. 4. Monthly Weather Review. W. B. 

 No. 600. February, 1917. Gov. Print. Office. 



Aerology No. 2. 59 pages, illus. Supplement No. 5, Monthly Weather Re- 

 view. W. B. No. 603. April, 1917. Gov. Print. Office. 



Weather Code for West Indian and Caribbean Sea Observers. 32 pages. 

 May, 1917. W. B. No. 612. Gov. Print. Office. 



Relative Humidities and Vapor Pressures over the United States, Including 

 a Discussion of Data from Recording Hair Hygrometers. 61 pages, illus., 

 charts. Supplement No. 6, Monthly Weather Review. W. B. No. 609. Idav, 

 1917. Gov. Print. Office. 



The Daily Weather Map, with explanation. 8 pages, 4 charts. June, 1917. 

 Weather Bureau Print. 



EXPENDITURES OF THE WEATHER BUREAU AT THE GOVERNMENT PRINTING 

 OFFICE DURING THE FISCAL YEAR 1916-17. 



Copies. Cost. 



Blank forms and maps 10, 058, 800 $10, 750. 78 



Cards 6,000 22. 73 



Blank books 234 225.06 



Binding 2, 256 2, 775. 85 



Posters, placards, charts, etc 7, 100 553. 19 



Separates and pamphlets 35,600 1,317.84 



Publications, miscellaneous 17,945 7,985.60 



Publications, periodical 19,100 7,189.48 



Congi-essional 1, 009 4^ 178. 63 



10, 147, 244 34, 999. IB 



Amount allotted $35, 000. 00 



Amount expended 34, 999. 16 



Unexpended , . 84 



LIBRARY. 



During the year, 827 books and pamphlets were added to the li- 

 brary, bringing the total strength of the collection up to about 

 36,300. On account of conditions abroad there was a marked de- 

 crease in the number of foreign publications received, and the files 

 of many important foreign periodicals are seriously in arrears. 



Considerable progress has been made in strengthening the station 

 libraries, especially that at Chicago, which serves as a depository for 

 a reserve collection of important books available for transfer to the 

 central office or elsewhere in case of need. 



SEISMOLOGY. 



The work of collecting and publishing earthquake data, begun 

 December 9, 1914, has been continued during the past year. These 

 data are of two kinds, noninstrumental reports of earthquakes felt 

 and instrumental records, often of quakes wholly imperceptible to the 

 senses. The noninstrumental reports are rendered by all the regular 

 stations of the bureau, about 200 in number, and also by nearly 

 all the bureau's 4,500 cooperative observers. The instrumental rec- 

 ords published by the bureau have been obtained in part by instru- 



