SEVENTEENTH ANNUAL YEAR BOOK— PART XII 



641 



HORSES AND MULES. 



Horses and Mules. Number and value on farms in the United States, 1867-1917. 



Note. — Figures in italics are census returns ; figures in roman are estimates of the 

 Department of Agriculture. Fetimates of numbers are obtained by applying esti- 

 mated percentages of increase or decrease to the published numbers of the preceding 

 year, except that a revised base is used for applying percentage estimates whenever 

 new census data are available. It should also be observed that the census of 1910. 

 giving numbers as of April 15, is not strictly comparable with former censuses, which 

 related to numbers June 1. 



1 Estimates of numbers revised, based on census data. 



