7 foundland to the international radiotelegraph convention signed at Washington, November 25, 1927, includes also the acceptance of the stipulations contained in the supplementary regulations signed at the same time as the convention. Panama The American Minister to Panama, in a despatch dated April 2, 1931, informed the Secretary of State that the ratification of Panama of the international radiotelegraph convention was published in the official Gazette, No. 5872, of November 26, 1930, and that the ratification of the general regulations annexed to the convention was published in the official Gazette, No. 5960, of March 20, 1931. The Minister stated that the deposit of the ratifications was expected to take place at an early date. SECOND MEETING OF THE INTERNATIONAL TECHNICAL CONSULTING COMMITTEE ON RADIO COMMUNICATIONS The following delegation will represent the United States at the meeting of the International Technical Consulting Committee on Radio Communications (C.C.I.R.), which is to be held in Copenhagen from May 27 to June 8, 1931: Delegates: Senator Wallace H. White, jr., of Maine, Chairman: Dr. C. B. Jolliffe, Chief Engineer, Federal Radio Com mission. Technical assistants: Dr. Irvin Stewart, Department of State; Mr. Gerald C. Gross, Radio Engineer, Federal Radio Com mission: Lieut. Commander Joseph R. Redman, U.S. Navy; Lieut. Wesley T. Guest. U.S. Army; Lieut. Thomas H. Maddocks, U.S. Army: Dr. C. G. Mellwraith, Bureau of Standards, Department of Commerce. Technical adviser: Capt. Kenneth B. Warner, Secretary, American Radio Relay League. Secretary to the Delegation: Mr. Vinton Chapin, Department of State. The establishment of the C.C.I.R. was authorized by article 17 of the international radiotelegraph convention, signed at Washington, November 25, 1927.8 Article 33 of the General Regulations referred to in article 17 charge the Committee with its duties and limits its functions. In accordance with paragraph three of article 33, the first meeting of the Committee was held at The Hague from September 18 to October 2, 1929. That meeting left seven unanswered questions as subjects to be discussed at the second meeting at Copenhagen. Fourteen other subjects have been added to the original seven. In the list which follows, the name of the government proposing a subject is indicated in parenthesis for each one after the original seven. 1. What are the most suitable methods, from a technical standpoint. to insure the good organization of a commercial radiotelephone service, especially long distance, connecting mobile stationsand particularly passenger-carrying vessels-to the public telephone networks? 2. Coordination of radiotelephony between fixed stations with the telephony on the land networks, particularly as concerns the following questions: (a) What is the most suitable method for measuring noise levels under the special conditions of a radiotelephone circuit? What should be the maximum tolerable limit of the noise level measured by this method? (b) What instrument would be suitable to permit the special operator who is situated at the junction point between the radiophone connection and the metallic circuit to measure the voice level? 3. The study and perfecting of methods technically available for maintaining constant the stability of a transmitter. 4. The study and perfecting of methods for the comparison of frequency standards. 5. Calibration of wave meters. 6. The study of methods to be adopted to reduce interference in the bands shared by fixed and mobile above 6,000 kc/s (wave lengths below 50m.). 7. The study of technical possibilities of reducing the frequency band occupied by a transmitter, by the partial suppression of the frequency band transmitted (that is, the emission of a single side. band only or of a side band and the carrier wave) for various types of transmission and types of service. 8. What measures are necessary to suppress harmonics of transmitters, and what is the permissible tolerance for the intensity of these harmonics? (Germany.) 9. What tolerance of overmodulation can one permit in telephone transmitters? (Germany.) 10. It would be desirable that the significance of the term “efficiency value of the current " appearing in the definition of the power of a transmitter, given by the C.C.I.R. in opinion No. 5 at its first meeting, and the manner of measuring this value be clearly and precisely stated. (Germany.) 11. What bands of waves, in accordance with recent progress in radio technique, are the most appropriate for the particular needs the various radio services must meet, taking into account wave-propagation factors? (Spain.) 12. Methods to be followed to cancel negative currents in arc transmitters. (Poland.) 13. Methods to be followed to cancel parasitic currents in receivers. (Poland.) 14. It is desirable to reserve some frequency bands exclusively for intercontinental long distance radiotelephone. (Dutch Indies.) 15. It would be desirable to modify the second opinion expressed by the C.C.I.T. (telephony) concerning the coordination of radiotelephony and telephony with wire in the international telephone service, which opinion is added as an annex to opinion No. 29 expressed at the first meeting of the C.C.I.R. at The Hague; in this sense as in the case of unfavorable radio electric conditions, it would be permissible to make prolongations in the radiophone connection by circuits of four wires. (Dutch Indies.) 16. Precision with which frequencies in kc/s and wave lengths in meters should figure in the list of frequencies and in the other official documents published by the International Bureau of the Telegraph Union. (Italy.) 17. Revision and clarification of the table of frequency tolerances given in the 14th recommendation of the first meeting of the C.C.I.R. at The Hague. (United States.) 18. Revision and classification of the 19th recommendation of the C.C.I.R. at The Hague relative to the information to be published by the International Bureau. (United States.) 19. The relation of the selectivity and frequency stability of radio receiving systems used for various classes of service to the frequency separation between transmitting stations. (United States.) 20. The study of technical possibilities for suppressing emissions which are not essential to the type of communications conducted by stations of various classes. (United States.) 21. Formulation of the proposals of the C.C.I.R. to be submitted to the radio conference at Madrid. (Denmark.) STATISTICS INTERNATIONAL CONVENTION AND PROTOCOL RELATING TO ECONOMIC STATISTICS Austria According to communiqué No. 4.984, March 27, 1931, of the Information Section of the League of Nations, Austria has forwarded to the Secretariat the instrument of its ratification of the international convention on economic statistics and protocol, signed at Geneva, December 14, 1928. Czechoslovakia The permanent delegate of the Czechoslovak Republic accredited to the League of Nations deposited with the Secretariat of the League on February 19, 1931, the instrument of ratification by the President of Czechoslovakia of the international convention and protocol relating to economic statistics, signed at Geneva, December 14, 1928. Southern Rhodesia On March 13, 1931, the Secretary-General of the League of Nations forwarded to the Secretary of State with a circular letter which had been sent to the members of the League of Nations and nonmember states which have not ratified or adhered to the international convention relating to economic statistics, signed at Geneva, December 14, 1928, but to whose acceptance this convention is open, a letter from the British Government, containing the reservations which it makes in adhering to the convention in respect of the colony of Southern Rhodesia. The text of the letter follows: SIR, I am directed by Mr. Secretary Henderson to inform you that His Majesty the King of Great Britain, Ireland, and the British Dominions beyond the Seas, Emperor of India, desires that the international convention relating to economic statistics of December 14th, 1928, should apply (in accordance with paragraph 2 of article 11) to the colony of Southern Rhodesia. 2. It is, however, desired to make the following reservation in respect of the above-mentioned colony: Articles 2-III (B). Annual Returns of Agriculture, Livestock, Forestry and Fisheries. Southern Rhodesia: The returns provided for in this paragraph will not contain information with regard to area under crops on native farms, and in native reserves, locations and missions stations. Although it is not quite clear to His Majesty's Government in the United Kingdom whether, on the strict wording of the convention, the procedure of article 17 has in point of fact been applied in respect of the application of the convention to colonies, I am to inform you that they desire that the reservation they wish to make concerning Southern Rhodesia may be communicated to the other parties to the convention, and that they may be asked if they have any objection thereto. 3. His Majesty's Government in the United Kingdom presume that if, after the expiry of a period of six months, no objections are made, they may assume that the parties to the convention consent to the reservation being made, and I am to state that they will in that case communicate with you officially requesting that the ac cession of Southern Rhodesia to the convention may be formally registered with the Secretariat of the League of Nations. I am [etc.] C. HOWARD SMITH In accordance with article 17 of the convention, the members of the League and the nonmember states which had ratified or adhered to the convention at the date of the receipt of the communication from the British Government have also been invited to state, within a period of six months, whether they have any objection to the reservation in question. |