A lesion may and does appear on a part or all of the person which may appear as a growth or withering away of a limb in all its muscles, nerves and blood supply. As in case of tumors on scalp, loss of hair, eruptions of face, growth of tonsils, ulcers of one or both ears, growths on outside and inside of eyes, a cause must precede an effect in all cases. A pain in head is an effect; cause is older than the effect and is absolute in all variations from normal conditions. A tumor on the head and under the skin is an effect only. It took matter to give it size, it took power to deliver that substance, the fact that a tumor was formed, shows that the power to build was present and did the work of construction. Another power should have been there to complete the work at that location; that power is the offbearing of the dead matter after the work of construction was complete. NERVE POWERS. If we think as men of reason should, we will count five nerve powers. They must all be present to build a part, and must answer promptly at roll call and work all the time. The names of these master workmen are sensation, motion, nutrition, voluntary and involuntary. All must answer at every roll call during life; none can be granted a leave of absence for a moment. Suppose sensation should leave a limb for a time, have we not a giving away of all cells and glands? An undue filling up follows quickly because sensation limits and tells when the supply is too great for the use of the builder's purpose. Suppose the nerve power known as motion should fail for a time, starvation would soon begin its deadly work for want of food. Suppose again the nerves of nutrition should fail to apply the nourishing showers we would surely die in sight of food. With the voluntary nerves we move or stay at the will of he or she who wishes to give direction to the motor powers, at any time a change by action is required. At this time I will stop defining the several and varied uses of the five kinds of nerves, and begin to account for growths and other variations, from the healthy to the unhealthy conditions of man. The above named are the five known powers of animal life, and to direct them wisely is the work of the doctor of Osteopathy. WITNESSES TO EXAMINE.