The mucous membrane lining the nasal passages is similar to other mucous membranes. It is here called the Schneiderian membrane after the name of a German anatomist named Schneider. It is continuous through the ducts with the mucous membrane of all the various accessory cavities of the nose. It is quite thin, in the upper part over the superior turbinate bone and partition (septum) while it is quite thick over the lower turbinate bone, the floor of the nose cavity and the lower part of the partition. It is well supplied with blood vessels, veins, and glands for producing the necessary secretion. The nose is an organ of breathing (respiration) and it warms and moistens the air we breathe and arrests particles of dust in the air before they enter the lungs. If the air we breathe is of an uneven temperature, or of marked degree of dryness, or if it is saturated with impurities, it always acts as a source of irritation to the mucous membrane of the upper respiratory tract, like the larynx. By the time the air reaches the pharynx, through the nose, it has become almost as warm as the blood, and also is well saturated with moisture. The mucous membrane that lines the nose cavity and especially that part over the lower turbinate bone, secretes from sixteen to twenty ounces of fluid daily. This fluid cleanses and lubricates the nose and moistens the air we breathe. Conditions may arise which interfere with this natural secretion. This may be due to the fact that some of the glands have shrunk or wasted (atrophied) and the secretion has become thick. This collects in the nose, decomposes and forms scabs and crusts in the nostrils. In this condition there will be dropping of mucus into the throat. This condition is usually only a collection of secretions from the nose,--which are too thick to flow away,--collect in the space behind the nose, and when some have accumulated, drop into the pharynx. [8 MOTHERS' REMEDIES]