One part, by weight, of Crude petroleum is dissolved in 99 parts of alcohol. Drug power, 1/100. What is the general field of action of Petroleum ? It acts prominently on the skin, producing eczema, fissures and pustules, and upon the glandular and digestive systems. Give the indications for Petroleum in dyspepsia. Ravenous hunger, which may come with many complaints ; empty, hungry feeling and nausea, which lasts all day, and is worse from riding in a carriage and worse from motion ; there is much pain in the gastric region ; which compels him to eat, and eating relieves ; there is aversion to fat food and to meat ; indigestion from eating sauer kraut. When should Petroleum be used in seasickness ? Nausea, which is worse from motion or riding, and accompanied by vertigo ; the vertigo comes on especially when the patient raises his eyes ; there is also bilious vomiting. What are the skin symptoms of Petroleum ? Vesicular eruptions, turning into pustules, which are covered with scabs ; the skin is harsh and dry, and there are deep cracks and fissures, with suppuration ; the finger tips are cracked and painful and the hands chap. Eczema in or behind the ears, with fetid discharge.