conducted to the room of elementary chemistry, in which you learn something of the laws of association of substances, that you can the better understand what has been told you in the physiological room, which is only a branch of anatomy, and intended to show you that nature can and does successfully compound and combine elements for muscles, blood, teeth and bone. From there you are taken to the room of the clinics, where you are first made acquainted with both the normal and abnormal human body, which is only a continuation of the study of anatomy. From there you are taken to the engineer's room (or operator's room) in which you are taught how to observe and detect abnormalities and the effect or effects they may and do produce, and how they effect health and cause that condition known as disease. PRINCIPLES. Principles to an Osteopath means a perfect plan and specification to build in form a house, an engine, a man, a world, or anything for an object or purpose. To comprehend this engine of life or man which is so constructed with all conveniences for which it was made, it is necessary to constantly keep the plan and specification before the mind, and in the mind, to such a degree that there is no lack of knowledge of the bearings and uses of all parts. After a complete knowledge of all parts with their forms, sizes and places of attachment which should be so thoroughly grounded in the memory that there would be no doubt of the intent of the builder for the use or purpose of the great and small parts, and why they have a part to perform in the workings of the engine. When this part of the specification is thoroughly learned from anatomy or the engineer's guide book, he will then take up the chapter on the division of forces, by which this engine moves and performs the duties for which it was created. In this chapter the mind will be referred to the brain to obtain a knowledge of that organ, where the force starts, how it is conducted to any belt, pully, journal, or division of the whole building. After learning where the force is obtained, and how conveyed from place to place throughout the whole body, he becomes interested and wisely instructed. He sees the various parts of this great system of life when preparing fluids commonly known as blood, passing through a set of tubes both great and small--some so vastly small, as to require the aid of powerful microscopes to see their infinitely small forms, through which the blood and other fluids are conducted by the heart and force of the brain, to construct organs, muscles, membranes and all the things necessary to life and motion, to the parts separately and combined. By this minute acquaintance with the normal body which has been learned in the specification as written in standard authors of anatomy and the dissecting rooms, he is well prepared to be invited into the inspection room to receive comparisons between the normal and abnormal engines, built according to nature's