Note 25 — SUFFOCATION.

A young animal may not so soon perish as an older one; and a strong and healthy individual may survive during a longer period than a creature that is in a state of debility. By filling the lungs with air a person may also be enabled to dispense with the act of respiration for a longer period; Mr. Kite made a very deep inspiration of 300 cubic inches, and was thus enabled to retain this quantity for 72 seconds, without a fresh inspiration; and divers in the pearl fisheries, inspire deeply before they descend. It has been, moreover, established by numerous experiments that the demand for oxygen in the lungs is materially influenced by the nature of the ingesta received into the stomach; Mr. Spalding, the celebrated diver, observed, that whenever he used a diet of animal food, or drank spirituous liquors, he consumed in a much shorter time the oxygen of the atmospheric air in his diving-bell; and therefore he had learned from experience to confine himself to a vegetable diet, and water, when following his avocation. And the priest, or conjurer (Pillal Karras, in the Malabar language) who attends the divers in the pearl fisheries of the east, enjoins, as a religious duty, an abstinence from all food, before he plunges into the ocean.

Muscular exertions, as in the act of struggling, will without doubt contribute to the expenditure of oxygen, and increase the demand for it, and therefore in its absence such movement must accelerate death by suffocation; this physiological fact will be hereafter more fully elucidated.