Begin at the brain, go down the ladder of observation, stop and whet your knives of mental steel sharp, get your nerves quiet by the opium of patience. Begin with the atlas, follow with the search-light of quickened reason, comb back your hair of mental strength, and never leave that bone till you have learned how many nerves pass through and around that wisely formed first part of the neck. Remember it was planned and builded by the mind and hand of the infinite. See what nerve fibers passes through and on to the base center, and each minute cell, fascia, gland and blood vessel of the lungs. Do you not know that each nerve fiber to its place is king and lord of all? CEREBRAL SPINAL FLUID. I think consumption begins by closing the channels of cerebro-spinal fluid in neck, which fluid stands as one of, if not the most highly refined elements in animal bodies. Its fineness would indicate that it is a substance that must be delivered in full supply continually to keep health normal; if so, we will for experimental reasons look at the neck ligated, as found in measles, croup, colds and eruptive fevers. Supply is stopped from passing below atlas for three days. During such diseases fever runs high at this time and dries up the albumen, giving cause for tubercles to begin, as fever has dried out the water and left the albumen in small deposits in the lungs, liver, kidneys and bowels. If this view of the great uses of brain fluid is true as cause of glandular growths and other dead deposits; have we not a cause for militis tuberculosis? Have we not encouragement to prosecute with interest, in the hope of an answer to the question, "What is tuberculosis?" Our writers are just as much at sea to-day as a thousand years ago. I will give the reader some of the reasons why I think the mischief was started while fluid was cut off by congestion of neck. How can the fluid be cut off at neck is a very natural question. By the crudest method of reasoning we would conclude that from the form of the neck, many objects are indicated, and the material of which it is composed would give reason to turn all its powers of thought, to ask why it is so formed, as to twist, bend, straighten, stiffen and relax at will, to suit so many purposes? A very tough skin--a sheathe--surrounds the neck with blood vessels, nerves, muscles, bones, ligaments, fascia, glands great and small, throat and trachea. In bones we find a great canal for spinal cord. It is well and powerfully protected by a strong wall of bone, so no outer pressure can obstruct the flow of passing fluids, to keep vitality supplied by brain forces, but with all the guards given to protect the cord, we find that it can be overcome by impact fluids to such degree as to stop blood and other fluids from supplying lungs and all below.