Twenty-five years ago, one of the major insect menaces in the U. S. was the cattle tick. The entire southern part of the U. S. was under tick quarantine. Damage every year throughout the U. S. amounted to about $45,000,000. But, working with its usual methodical efficiency, the Department of Agriculture practically wiped out the cattle tick by the only sure method: dipping in an arsenical solution. Only a few counties in Texas and six in southern Florida are still under quarantine. Trouble there is that ticks are carried not only by cattle,...
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