The ordinary means of bathing is from a machine, a contrivance which has not progressed in luxury or convenience with the lapse of time. Of course for those who cannot swim the attractions of the open sea and the dive from the boat are inaccessible. Delicate people and children should make use of a machine or tent, if obtainable, in preference to undressing in the open air, because the mere exposure to the air in the act of stripping is a potent means of loss of animal heat. It is best to avoid loitering about after undressing, and to run rapidly into the water and immerse the whole body under the first available wave.