Abstract
The sailors on board a steam-ship are usually left to a special life-environment in all respects, especially temperature, victuals and drinkables, and living place. On this fact the authors considered that the health of crew, say, their blood-pressures might be greatly influenced by such circumstances and found, after many years of medical experiences in a ship-clniic that these particular circumstances had more or less effects on some natures of their blood-pressures, by means of statistical observations on 500 sailors on voyage. As the plan of the investigation, two main classifications were made: on for age and period of service at the sea, and the other for a high temperature department and on ordinary one as to the position in the ship. The investgations led the authors to the following conclusions. A) As to the blood-pressure by age, nothing unusual is observed of the crew below 19 years of age, and few between 20 and 49 of age have high blood-pressures, while most of the crew aged between 40 and 49 years have obviously low ones. B) As for the length of sea service, are found in the group of more than 10 years low blood-pressure. C) As for the position in the ship, the crew bring in the high temperature department have rather low blood-pressures, compared with those living in ordinary places in temperature.
