Appetite and Taste are the sense functions that are most important to health, and hence they are the most important to study and understand. They are the guide in nutrition and the guard of the body machine--the Mind Power-Plant. Smell also is an important aid in selection and discrimination and is an effective assistant of Appetite. APPETITE AND TASTE ANALYSED Appetite should be dignified and recognised as a distinct sense. Normal Appetite is Nature's means of indicating her fuel and repair requirements for the Mind Power-Plant. Study Normal Appetite and heed its invitation. It prescribes wisely. Its mark of distinction, to differentiate it from False Appetite, is "watering of the mouth" for _some particular thing_. False Appetite is an indefinite craving for _something_, ANYTHING! to smother disagreeable sensations and frequently is expressed by the symptom of "faintness" or "All-gone-ness." [Vide the "A.B.-Z. of OUR OWN NUTRITION."] Taste is the chemist of the body; of the Mind Power-Plant. More correctly, perhaps, it is the report of a chemical process relating to nutrition. Taste is an evidence of nutrition. While taste lasts a necessary process is going on. Taste should, therefore, be carefully studied and understood. Both Taste and Appetite differ in different individuals and in the same individual under different conditions of thought or activity. Taste is also dependent on supply of the mouth juices usually called saliva, and these differ materially in individuals, necessitating self-study, self-understanding, and self-care to insure prevention of indigestion and disease. The most important part of nutrition is the right preparation of food in the mouth for further digestion. The most important discovery in physiology is the relation of compulsory or involuntary swallowing to the right preparation of food for digestion. * * * * * Taste is evidence of nutrition. Whatever does not taste, such as glass or stone, is not nutritious.[6] [Footnote 6: Pure proteid or albumin is quite tasteless but is always accompanied by tasting substance, and separation of the proteid molecule from enveloping material is an important function of mouth-capacity in digestion.] Taste is excited by the dissolving of food in the mouth, and while it lasts a necessary process of preparation for digestion is going on. The juices of the mouth have the power to transform any food that excites taste into a substance suitable for the body. Nothing that is tasteless, except water and pure proteid, only by distinct invitation of appetite, should be taken into the stomach. If we swallow only the food which excites the appetite and is pleasing to the sense of taste, and swallow it only after the taste has been extracted from it, removing from the mouth the tasteless residue, complete and easy digestion will be assured and perfect health maintained. * * * * * NATURE'S FOOD FILTER