If digestion is the effect of organs, fluids and forces, then the student of nature's law must be governed by well known truths, such as the location of the brain, connection of the nerves to other organs, bringing all parts interested in digestion in mental view. Thus you have a chance to know if one organ has an assisting relation to any other organ or system or if its products are of general or of special use. A few questions at this point of inquiry would be in place. Does the brain give assistance in digestion, and why may we reasonably suppose so, when digestion does its work normally and has a full, rich supply of blood? Yet disease enters the system, and begins its work with general weakness, swelling, wastings, and pain with some, or all the glands congested and sore, and a plenty of rich blood all the time. Then are we justified to go to the brain and examine the electric and magnetic batteries? We know such forces exist but as their location in the brain is not known farther than the fact of their existence, we do not know how they are fed, nor from where, so we are fully warranted in seeking a use for both powers--magnetic and electric. One says the power of electricity belongs more to the motor nerves and the magnetic to the nutrient system; if not they are happily blended and give the results. Without such forces life and motion could not be sustained. As it is not my object to write a treatise on general physiology, I will turn at once to the subject of the relation of life and health as affected by the abnormal supply and action of ear-wax.[3] [Footnote 3: "The secretion of the external auditory meatus, mixed with the secretion of the neighboring glands or ceruminous glands, forms the well known ear-wax or cerumen. The secretion in this place contains a reddish pigment of a bitterish sweet taste, the composition of which has not been investigated." American Text-Book of Physiology.] UNAIDED INVESTIGATION. As our investigations are without the assistance of ancient or modern writers we will have to reason that man is a machine of form and power, forming its own parts and generating its own powers as it has use for them. At this time we begin to reason thus, that all powers are invisible and we see effect only. We know such forces to be abundant in nature, and life is sustained by them. To find the substances in the body that causes them to act and how to act, has been the object of my journey as an explorer. If they give us health when normal action prevails and disease only when abnormal, then we are admonished to form a more intimate acquaintance with the qualities, and with all the products, when formed in this great laboratory which compounds and qualifies each substance to fill its mission of force, construction, purity and action. CHAPTER V. DISEASES OF THE CHEST.