Telegraphy the sense of a system that can transmit arbitrary messages over arbitrary distances. Lines of signalling relay stations can send messages to any required distance, but all these systems are limited to one extent or another in the range of messages that they can send. A system like flag semaphore, with an alphabetic code, can certainly send any given message, but the system is designed for short-range communication between two persons. An engine order telegraph, used to send instructions from the bridge of a ship to the engine room, fails to meet both criteria; it has a limited distance and
Flags and arms of cantons of Switzerland Flags and arms of cantons of Switzerland Each of the 26 modern cantons of Switzerland has an official flag and a coat of arms. The history of development of these designs spans the 13th to the 20th centuries. The cantons are listed in their order of precedence given in the federal constitution. This reflects the historical order of precedence of the Eight Cantons in the 15th century, followed by the remaining cantons in the order of their historical accession to the confederacy. "Standesfarben" were used to identify the (historical) cantons when the full banner was not available for display, although