12 BULLETIN 584, U. S. DEPARTMENT OF AGRICULTURE. 
TABLE 3.—Comparison of hogs raised and lost in 8 original experimental coun- 
ties and 15 surrounding counties, 1912-1915. 
1912 1913 
Counties. | 
LOB Hogs lost. Hoes Hogs lost. 
Number. | Number. | Per 1,000.) Number. | Nwmber.| Per 1,000. 
Average of 3 experimental counties. ......- 73, 984 21,025 284 | 101,504 7, 840 77 
Average of 15 surrounding counties. .......|-.--.-..--|---.------|---------- 80, 993 14, 858 183 
1914 1915 
Counties. 
Hides Hogs lost. pices, Hogs lost. 
Number. | Number. | Per 1,000.| Number. | Number. | Per 1,000 
Average of 3 experimental counties. ......- 119, 823 4,984 41 | 138,391 3,341 24 
Average of 15 surrounding counties. .--..--. 67, 888 7,977 117 58, 021 5, 593 96 
\ 
Experimental counties: Dallas, lowa; Montgomery, Ind.; and Pettis, Mo. Experimental work began 
in 1913. 
TABLE 4.—Comparison of hogs raised and lost in 4 experimental counties and 
18 surrounding counties, 1913-1915. 
1913 1914 1915 
Counties. 
gees Hogs lost. eee Hogs lost. oe Hogs lost. 
Per | Per Per 
Number.| Number.| 1,000. | Number.| Number.| 1,000. | Number.| Number.| 1,000. 
Average of 4 experimental 
Counties: 5s eee 81,659 | 21,727| 266] 81,811 | 4,062 49 | 95,108 557 5 
Average of 18 surround- 
INE (COUNTIES)- -/-se ee. - == 53,997 | 16,734 309 | 44,028 7, 230 164 | 47,113 3,877 82 
Experimental counties: Clay, Iowa; Gage and Johnson, Nebr.; Marshall, Kans.; and Renville, Minn- 
Experimental work began in 1914. 
Tables 3 and 4 seem to show clearly the effects of the experimental 
work. Considering first Table 3, it is remarkable to see the great 
reduction in losses from cholera in Dallas, Montgomery, and Pettis 
Counties in 1913 as compared with 1912, and to note that the loss 
per thousand was but little more than one-third of that which oc- 
curred in 1913 in the 15 neighboring counties where no experimental 
vork was being done. It is seen also that the loss per thousand has 
continued to decrease during 1914 and 1915 in both cases, and that in 
the case of 3 experimental counties it has remained constantly from 
two and one-half to four times less than in the 15 surrounding 
counties. These results were obtained notwithstanding the fact that 
in the experimental counties considerably more hogs were being 
raised. 
Table 4 presents additional data obtained from a different set of 
counties. It shows that in the four experimental areas consisting of 
Clay County, Iowa, Gage and Johnson Counties, Nebr., Marshall’ 
