Note 65 — Chapter VIII

“The heart at every contraction expels about two ounces of blood, and at sixty in a minute one hundred and sixty ounces are sent forth; in three minutes the whole blood (about thirty pounds), must pass through the heart, and in one hour this takes place twenty times. Who,—reflecting on the tissues to be permeated, the functions to be discharged, the secretions to be formed from, and the nutritious substances to be taken into the circulating fluid; and reflecting upon how soon each particle, each atom of blood, after having been deteriorated in its constitution, and rendered unfit for the discharge of its important duties, is again driven through the lungs, and again aerated,—can retire from the investigation without feelings ennobled, and the whole man rendered better!”—Dr. Robertson.