This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
Buchheim and some modern writers express doubts as to whether sulphur really increases secretion from the bronchial mucous membrane and the skin; but I cannot agree with them, for I have frequently seen an augmentation of these secretions under the use of this remedy. According to Boecker the urinary water and solids are increased in amount under the action of sulphur, but this requires confirmation (Husemann).
Medicinal doses of ammonia, under favorable conditions of warmth, etc., increase most of the secretions, such as those of the skin, the kidneys, and the bronchial mucous membranes. The liq. ammoniae acetatis has a special action on the skin and kidneys, the carbonate on the lungs, the chloride on the liver and kidneys (Stewart, Rutherford). The pulmonary secretions and the bile are also rendered more fluid - ammonium chloride especially stimulates the latter secretions. The alkaline salts of ammonia are not "remote antacids," i.e., they do not render the urine alkaline.