372 
IOWA DEPARTMENT OF AGRICULTURE 
The benefits derived by the stock breeders co-operating with our de- 
partment may well be illustrated by the following example: 
W. F. Wilcox, a prominent farmer and stock raiser near Marshalltown, 
requested a member of our department to visit his premises and test his 
herd of milch cows. Nine cows were tested and five reacted to the test. 
At the owner's request he was granted permission to keep the cows iso- 
lated until, as he thought, they would be better fitted for market. Some 
two or three months later we were surprised to learn that the owner had 
permitted these animals to mingle with the remainder of the herd. Com- 
plaint was filed by the local authorities, and upon investigation it was 
found that his swine were also affected with tuberculosis. V/hile it is a 
difficult matter to detect tuberculosis among swine on foot, it was plainly 
visible, and a post mortem held on one of the hogs revealed generalized 
tuberculosis. The balance of the cattle were tested, consisting of thirty- 
two head, and twenty-five out of this number responded to the test, about 
80 per cent, and were slaughtered by the Agar Packing Co., of Des 
Moines. All showed marked lesions, three being consigned to the tank. 
TEST SHEET NO. 3. 
MARSHALLTOWN HEED. 
6 
Glands 
CD 
bc 
a 
3 
Glands 
I' 
13 
a 
V 
ft 
CD 
Disposition 
o 
> 
(-1 
8 
2 
o 
a 
2 
■3.2 
1 
1 
o 
t 
2261 
2209 
2422 
2312 
2398 
2278 
31 
2470 
2303 
16 
2193 
2139 
32 
2459 
29 
2481 
236.5 
2110 
2101 
2167 
2039 
2344 
2126 
2354 
2456 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
Being convinced that tuberculosis existed to a considerable extent 
among cattle at the various state institutions, under the supervision of 
the State Board of Control, we requested permission to test the dairy 
herds, which was granted, and we immediately began an investigation, 
with results as follows: 
