Assuming that the foregoing reports are true, the Government of the United States, reserving for future consideration the legality and propriety of the deceptive use of the flag of a neutral power in any case for the purpose of avoiding capture, desires very respectfully to point out to his Britannic Majesty's Government the serious consequences which may result to American vessels and American citizens if this practice is continued. The occasional use of the flag of a neutral or an enemy under the stress of immediate pursuit and to deceive an approaching enemy, which appears by the press reports to be represented as the precedent and justification used to support this action, seems to this Government a very different thing from an explicit sanction by a belligerent Government for its merchant ships generally to fly the flag of a neutral power within certain portions of the high seas which are presumed to be frequented with hostile warships. The formal declaration of such a policy of general misuse of a neutral's flag jeopardizes the vessels of the neutral visiting those waters in a peculiar degree by raising the presumption that they are of belligerent nationality regardless of the flag which they may carry. In view of the announced purpose of the German Admiralty to engage in active naval operations in certain delimited sea areas adjacent to the coasts of Great Britain and Ireland, the Government of the United States would view with anxious solicitude any general use of the flag of the United States by British vessels traversing those waters. A policy such as the one which his Majesty's Government is said to intend to adopt would, if the declaration of the German Admiralty be put in force, it seems clear, afford no protection to British vessels, while it would be a serious and constant menace to the lives and vessels of American citizens. The Government of the United States, therefore, trusts that his Majesty's Government will do all in their power to restrain vessels of British nationality in the deceptive use of the United States flag in the sea area defined by the German declaration, since such practice would greatly endanger the vessels of a friendly power navigating those waters and would even seem to impose upon the Government of Great Britain a measure of responsibility for the loss of American lives and vessels in case of an attack by a German naval force. You will impress upon his Majesty's Government the grave concern which this Government feels in the circumstances in regard to the safety of American vessels and lives in the war zone declared by the German Admiralty. You may add that this Government is making earnest representations to the German Government in regard to the danger to American vessels and citizens if the declaration of the German Admiralty is put into effect. GERMANY'S ANSWER. _BERLIN, (via London,) Feb. 18.--German Government's reply to the American note follows:_