12 
BULLETIN 584, U. S. DEPARTMENT OF AGRICULTURE. 
Table 3. — Comparison of hogs raised and lost in 3 original experimental coun- 
ties and 15 surrounding counties, 1912-1915. 
1912 
1913 
Counties. 
Hogs 
raised. 
Hogs lost. 
Hogs 
raised. 
Hogs lost. 
Average of 3 experimental counties 
Number. 
73, 984 
Number. 
21, 025 
Per I'OOO. 
284 
Number. 
101,504 
80, 993 
Number. 
7,840 
14,858 
Per 1,000.. 
77 
183: 
1914 
1915 
Counties. 
Hogs 
raised. 
Hogs lost. 
Hogs 
raised. 
Hogs lost. 
Average of 3 experimental counties 
Average of 15 surrounding counties 
Number. 
119, 823 
67,888 
Number. 
4,984 
7,977 
Per 1,000. 
41 
117 
Number. 
138, 391 
58,021 
Number. 
3,341 
5,593 
Per 1,000 
24 
96 
Experimental counties: Dallas, Iowa: Montgomerv, 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. 
Counties. 
Average of 4 experimental 
counties 
Average of 18 surround- 
ing counties 
1913 
1914 
Hogs 
raised. 
Number. 
81, 659 
53, 997 
Hogs lost. 
Hogs 
raised. 
Number. 
21, 727 
16, 734 
Per 
1,000. 
266 
309 
Number. 
81,811 
44,028 
Hogs lost. 
Number. 
4,062 
7,230 
Per 
1,000. 
49 
164 
1915 
Hogs 
raised. 
Number. 
95, 108 
47, 113 
Hogs lost. 
Number. 
557 
3,877 
Per 
1,000. 
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 
work 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 beings 
raised. t 
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 
