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Repellent devices and substances 2 2 1 Rene lie nts-Continued. i Naph th ale ne f lake s Automatic flash gun Tar-paper conns •. Traps Scaring devices Sprays Electric fences Standard "deer-proof" fences 2 \ Conclusion.. . .

The world's worst mammal pest, the "brown rat (Rattus norvegicus), was not introduced into the American colonies until 1775. European countries, therefore, have had mar^more years of experience in combating this rodent than has the United States. An account of methods of control used in Europe, gathered from conferences with authorities in several coiintries, should aid in solving the control problem in this covmtry. From a firsthand study of the situation, it seens fair to say that those nations that have passed rat-control laws have been much more successful in reducing the numbers of rats than have those i7ith no legislation and no definite program on the subject. METHODS IN EUROPE Denmark Denmark, •which is about half the size of South Carolina, was the first country to attempt to solve the rat problem on a nationwide basis. In 1898, Emil Zuschlag, a sanitary engineer, made am address to stimulate interest in a national law that would provide fronds for the systematic destruction of rats. His address led to the organization of a society of 2,000 members to demonstrate his methods. During 18 weeks of the following year 100,000 rats were caught in Copenhagen and Fredericksberg.