As one delves deeper and deeper into the machinery and exacting laws of life, he beholds works and workings of contented laborers of all parts of the one common whole--the great shafts and pillars of an engine working to the fullness of the meaning of perfection. He sees that great quarter-master the heart, pouring in and loading train after train and giving orders to the wagon-master to line his teams and march on quick time to all divisions, supply all companies, squads and sections with rations, clothing, ammunition, surgeons, splints and bandages, and put all the dead and wounded into the ambulances to be repaired or buried with military honors by Captain "VEIN," who fearlessly penetrates the densest bones, muscles and glands, with the living waters to quench the thirst of the blue corpuscles, who are worn out by doing fatigue duty in the great combat between life and death. He often has to run his trains on forced marches to get supplies to sustain his men of life when they have had to contend with long sieges of heat and cold. Of all officers of life, none have greater duties to perform than the quarter-master of blood supply, who borrows the force with which he runs his deliveries from the brain which give motion to all parts of active life. MILITIS TUBERCULOSIS. A tubercle is a separate body being enveloped.[4] [Footnote 4: Chambers.] As all descriptions of a tubercle in books amount to about this, that the tubercle is an amount of fleshy substance which may be albumen, fibrin, or any other substance collected and deposited at one place in the human body, and covered with a film composed generally of fibrinous substances, and deposited in its spherical form, and separated from all similarly formed spheres by fascia. They may be very numerous, for many hundreds may occupy one cubic inch and yet one is distinct from all others. They seem to develop only where fascia is abundant; in the lungs, liver, bowels and skin. After formation they may exist and show nothing but roughened surfaces, and when the period of dissolution and the solvent powers of the chemical laboratory take possession to banish them from the system, it generally begins its labors at such time as some catarrhal disease is preying upon the human system. Nature seems to make its first effort for the purpose of disposing of such substances as have accumulated at the catarrhal period. At which time it brings forward all the solvent qualities and applies them with the assistance of the motor force to drive out through the bowels, lungs, porous and excretory system all irritable substances. Electricity is called in as the motor force to be used in expelling all unkindly substances. By this effort of nature, which is an increased action of the motor nerves, electricity is brought to the degree of heat usually called fever, which if better understood we would possibly find to be the necessary heat of the furnace of the body being used to convert dead substances into gas