Great Britain and France have placed rubber on the absolute contraband list, and leather on the conditional contraband list. Rubber is extensively used in the manufacture and operation of motors, and, like petrol, is regarded by some authorities as essential to motive power today. Leather is even more widely used in cavalry and infantry equipment. It is understood that both rubber and leather, together with wool, have been embargoed by most of the belligerent countries. It will be recalled that the United States has in the past exercised the right of embargo upon exports of any commodity which might aid the enemy's cause. _(9) The United States has not interfered with the sale to Great Britain and her allies of arms, ammunition, horses, uniforms, and other munitions of war, although such sales prolong the conflict._ There is no power in the Executive to prevent the sale of ammunition to the belligerents. The duty of a neutral to restrict trade in munitions of war has never been imposed by international law or by municipal statute. It has never been the policy of this Government to prevent the shipment of arms or ammunition into belligerent territory, except in the case of neighboring American republics, and then only when civil strife prevailed. Even to this extent the belligerents in the present conflict, when they were neutrals, have never, so far as the records disclose, limited the sale of munitions of war. It is only necessary to point to the enormous quantities of arms and ammunition furnished by manufacturers in Germany to the belligerents in the Russo-Japanese war, and in the recent Balkan wars, to establish the general recognition of the propriety of the trade by a neutral nation. It may be added that on the 15th of December last, the German Ambassador, by direction of his Government, presented a copy of a memorandum of the Imperial German Government which, among other things, set forth the attitude of that Government toward traffic in contraband of war by citizens of neutral countries. The Imperial Government stated that "under the general principles of international law, no exception can be taken to neutral States, letting war material go to Germany's enemies from or through neutral territory," and that the adversaries of Germany in the present war are, in the opinion of the Imperial Government, authorized to "draw on the United States contraband of war, and especially arms worth billions of marks." These principles, as the Ambassador stated, have been accepted by the United States Government in the statement issued by the Department of State on Oct. 15 last, entitled "Neutrality and Trade in Contraband." Acting in conformity with the propositions there set forth, the United States has itself taken no part in contraband traffic, and has, so far as possible, lent its influence toward equal treatment for all belligerents in the matter of purchasing arms and ammunition of private persons in the United States.