This is a German manual for the ship's physician and the medical officer of ports, including both seaports and other ports of entry into the nation. It deals with international health conventions with special reference to the needs of German ship and port physicians. It sets forth in detail the regulations governing German physicians in the German merchant marine and the control of communicable diseases in ports and on ships, including the use of the radio communication at sea except the SOS. The manual will be of little use to American physicians in general, except as they may find it of general interest. To officials dealing with international quarantine and health and medical service at sea, it is a valuable supplementary volume.