Only ten States (in the Southeast) are comparatively free from mice. In the other 38 States, 1,000 mice allowed to run on the 65 million acres of hay raised per year would chew up 30 million dollars worth of hay. They kill trees, chew up gardens, nibble at stored grain. It is estimated that Connecticut has lost $500,000 in fruit crops during years when mice were plentiful. Sick mice infect pigs with erysipelas; pigs pass it on to humans.
Mice do most damage in "mouse years" when the mouse population exceeds the normal. Naturalists have...
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