“ In some states their powers are somewhat restricted; in New York they cannot enter a city to suppress a riot unless so ordered by the governor or on request of the mayor with the approval of the governor. ”

“ The largest state police force is that of Pennsylvania, consisting in 1920 of 415 officers and men. It was organized in 1905 somewhat after the model of the Canadian Northwest police. It is composed of five troops with posts in different parts of the state. Detachments are sent out to the 40 stations and from the stations small patrols operate in every direction. The posts and stations are in constant communication, and help can be rushed immediately to any point. They are empowered to make arrests for any violation of the law ”