_Symptoms_ consist in the profuse flow of saliva, either in long stringy filaments, or if there is much movement of the jaws, in frothy masses; frequent deglutition; increased thirst and disordered digestion (tympany, inappetence, colics, constipation, diarrhœa). In mercurial salivation there may be loose teeth, swollen, spongy, ulcerated gums, tympany, rumbling, and the passage of fœtid flatus and soft ill-digested stools. _Treatment_ consists in removing the cause, whether this is to be found in faulty food or drink, diseased teeth or gums, disordered stomach, or the irritant food medicine or poison ingested. If more is wanted simple astringent washes like those recommended for stomatitis and a free access to pure water will often suffice. Tartar emetic or opium has been known to succeed in obstinate cases. Friction over the parotid or submaxillary gland with camphorated spirit, tincture of iodine or soap liniment is sometimes required. In mercurial salivation chlorate of potash is especially to be commended, and when the bowels have been unloaded of the agent, iodide of potassium will hasten its elimination from the tissues and blood. DILATED SALIVARY DUCTS. SALIVARY CALCULUS. SALIVARY FISTULA. These are all surgical diseases and are to a large extent inter dependent. The impaction of the calculus in the duct leads to overdistension of the duct posterior to the obstruction, and the rupture or incision of the distended duct, determines the fistula. It is only necessary here to point out the seat of these lesions: the distended sublingual ducts constituting a more or less rounded swelling to one side of the frænum lingui, the Whartonian duct forming a tense rounded cord from the papilla back of the lower incisor teeth backward on the inner side of the lower jaw, and the Stenonian duct forming a similar tense cord from near the middle of the cheek down around the lower border of the jaw in company with the submaxillary artery and backward on the inner side of its curved border to the parotid gland. For the more precise lesions, symptoms and treatment of these, see a work on surgery. INFLAMMATION OF THE PAROTID GLAND. PAROTITIS. Causes: traumatic; calculus; grains; barley and other beards; infecting microbes. Symptoms: fever, dullness, buccal heat, salivation, difficult mastication, swelling of gland and duct, protruded nose, stiff neck, fœtor, dyspnœa, facial paralysis, induration of gland, abcess. Diagnosis from pharyngitis, abcess of guttural pouch or pharyngeal glands; from tumors. Treatment: avoidance of causes; derivation; astringent, antiseptic washes; wet antiseptic bandages to throat; cool pultaceous diet. Open abscess and disinfect. For induration deobstruents. For sloughing antiseptics.