PART XI. 



Annual Report of the Iowa Weather and Crop 

 Service for 1913. 



By GEO. M. CHAPPELL, Director. 



The data contained in this report have been compiled from the 

 monthly and weekly bulletins issued by the Iowa Weather and Crop 

 Service, in co-operation with the Weather Bureau of the U. S. 

 Department of Agriculture. In this condensed form the matter 

 will be especially valuable and convenient for reference and com- 

 parison in future years, and that is the special purpose of this 

 compilation. 



Reports have been received regularly each month from 116 co- 

 operative meteorological stations and from the U. S, Weather 

 Bureau stations at Des Moines, Davenport, Dubuque, Charles City, 

 Keokuk and Sioux City, Iowa, and Omaha, Nebr. 



An effort has been made to secure at least one reliable crop cor- 

 respondent in each township in the State, but while this has not as 

 yet been attained, there are about 1,400 such correspondents who 

 make reports on the acreage, condition, average yield and average 

 price of staple crops during the season. 



The instrumental equipment has been kept up to a hisrh standard, 

 new thermometers, rain gages and instrument shelters being issued 

 to co-operative observers to replace worn out or defective instru- 

 ments or equipment whenever necessary. 



There have been distributed during the year 20,450 copies of the 

 Monthly Reports of the Iowa Weather and Crop Service, and 

 40,000 copes of the AA^eekly AVeather Crop Bulletins. 



The daily weather forecasts were distributed by telegraph at the 

 expense of the U. S. Weather Bureau to 70 towns, by mail to 2,439 

 addresses, by rural delivery to 1,444 addresses, and by free tele- 

 phone to 103,156 subscribers. 



Special frost warnings were sent during the fruit blooming season 

 to all orchardists in the State, who were prepared to use orchard 

 heaters in case of frost or injurious temperatures. 



In addition to the regular monthly crop reports a special report 

 was made each month during the growing season showing the con- 

 dition and probable output oi apples. This report was made in 

 co-operation with the Horticultural Department, Iowa Experiment 

 Station, and will be continued on a larger scale during the season 

 of 1914. 



