Note A — METHODS OF DESTROYING RATS.
Reading edition
Several species of rats are known as "house rats," including the black rat (Mus rattus), the roof rat (Mus alexandrinus), and the brown rat (Mus norvegicus). Of these, the last is the commonest and most widespread in this country. Not one of these species is a native, but all were imported from the Old World. As their habits in general are similar, the instructions given in the bulletin apply alike to all.