We must start our exploring boat with the aorta, and float with this vital current; see the captain as he unloads supplies for the diaphragm and all that is under it. We must follow him and see what branch of this river will lead to a little or great toe, or to the terminals of the whole foot. We must pass through the waters of the dead sea by the way of the vena cava, and observe the boats loaded with exhausted and worn out blood, as it is poured in and channeled back to the heart, with all below the diaphragm. Carefully watch the emptying of the vena azygos major and minor, with the veins of the arms and head all being poured in from little or great rivers to the vena innominate on their way to the great hospital of life and nourishment; whose quarter-master is the heart; whose finishing mechanic is the lung. Having acquainted ourselves with the forms and locations of this great personality we are ready at this time after examination, and found worthy and well qualified to enter into a higher class in which we can obtain an acquaintance with the physiological workings separately and conjoined of the whole being. At this place we become acquainted with the hows and whys of the production of blood, bone and all elements found in them, necessary to sustain sensation, motion, nutrition, voluntary and involuntary action of the nerve system. The hows and whys of the lymphatics, the life sustaining powers of the brain, heart, lungs, and all the abdominal system, with their various actions and uses, from the lowest cellular membrane to the highest organ of the body. RESULT OF REMOVAL OF DIAPHRAGM. When we consult the form of the cross-bar that divides the body in two conjoined divisions and reason on its use, we arrive at the fact that the heart and lungs must have ample space or room to suit their actions while performing their functions. At this time a question comes up: What effect would follow the removal of the fence between heart, lungs and brain, above that dividing muscle, and the machinery that is situated below said cross-bar? We see at a glance that we would meet failure to the extent of the infringement on demanded room for normal work of heart to deliver below lungs to prepare blood, and the brain to pass nerve power to either engine above, and all organs below the diaphragm. SUSTAINING LIFE PRINCIPLES.