Although the ownership of mines in most countries is nominally open to citizens and aliens alike, exceptions and restrictions tend to keep the control in the hands of citizens. For example, it is impossible for foreigners to control any mining company in Japan. Concessions in Holland and the Dutch colonies are limited to Dutch subjects and in Bolivia to Bolivian citizens. The legislation suggested since the outbreak of the World War may develop a similar condition in the possessions of Great Britain and those of her allies. In peace the relations of two countries may be largely determined by the ownership of property; owners of property in a foreign country may strongly influence the policy of the two governments toward each other. In emergencies, the political and the commercial control are put to the test, and there results either a deadlock or the victory of one over the other. An important commercial relation exercising political influence is the incorporation of companies under the laws of different countries. Mining companies in China, like the Kailan Mining Administration, organize at Hong Kong to obtain British protection and are thus subject to British control, in spite of the fact that Belgian money finances the company. Some companies organized in Japan may also own Chinese coal mines. As relatively few regions of the world have coal in excess of their own needs, the larger number are dependent on imports. If a country with coal controls also steamship lines, it may completely control the coal situation in the importing country. England, with about half the total world’s shipping and a good supply of seaport coal, has been in a position to dominate coal exports, even to handling the excess American coal. During the last three or four years the scarcity of shipping has given increased importance to American and Japanese shipping, but the English still exert a strong influence. Their docks and storage facilities are the best, and their ships are still numerous. Railroad shipping rights over the National Lines in _Mexico_ give a certain amount of control over the coal industry. The National Lines are state owned and have a special agreement giving trackage rights to two companies, the American Smelting and Refining Co., and the Peñoles Company, of German ownership. Since the Mexican railway service has been disturbed, the German company has been operating with cars and engines of its own. It has many coke ovens and large coal reserves, and has been the chief competitor of the American company in Mexican metallurgy. No patent is likely to limit coal industries, except as regards the by-products of coke. Before the war, coal-tar products were largely developed by Germans, who patented their processes in many countries, but offered no such protection to foreign inventions by patents in Germany. They limited production chiefly to their German plants, and exported about $50,000,000 worth a year.