than that held by him under his line commission, provided that his rank under said commission be not higher than that of first lieutenant, and, while on duty, requiring him to participate regularly and frequently in aerial flights, he shall receive in addition an increase of 50 per centum in the pay of his grade and length of service under his line commission. The rating of military aviator shall not be hereafter conferred upon or held by any person except as hereinafter provided, and the number of officers with that rating shall at no time exceed fifteen. Each military aviator who shall hereafter have duly qualified as such under the provisions of this act shall, while so serving, have the rank, pay, and allowances of one grade higher than that held by him under his line commission, provided that his rank under said commission be not higher than that of first lieutenant, and, while on duty requiring him to participate regularly and frequently in aerial flights, he shall receive in addition an increase of 75 per centum of the pay of his grade and length of service under his line commission. Sec. 3, id.

8891. Same-Personnel of enlisted men, rating of aviation mechanician. The aviation enlisted men hereinbefore provided for shall consist of twelve master signal electricians, twelve first-class sergeants, twenty-four sergeants, seventy-eight corporals, eight cooks, eightytwo first-class privates, and forty-four privates. Not to exceed forty of said enlisted men shall at any one time have the rating of aviation mechanician, which rating is hereby established, and said rating shall not be conferred upon any person except as hereinafter provided.1 Sec. 3, id. 516.

889j. Same-Instruction in art of flying, and increase of pay.— Twelve enlisted men at a time shall, in the discretion of the officer in command of the aviation section, be instructed in the art of flying, and no enlisted man shall be assigned to duty as an aerial flyer against his will except in time of war. Each aviation enlisted man, while on duty that requires him to participate regularly and frequently in aerial flights or while holding the rating of aviation mechanician, shall receive an increase of fifty per centum in his pay. Sec. 3, id.

889k. Same-Qualification certificates required, examinations for, etc.-Except as hereinafter provided in the cases of officers now on aviation duty, no person shall be detailed as an aviation officer, or rated as a junior military aviator, or as a military aviator, or as an aviation mechanician, until there shall have been issued to him a certificate to the effect that he is qualified for the detail or rating, or for both the detail and the rating, sought or proposed in his case,

1 1 Held, that aviation enlisted men holding the rating of aviation mechanician are entitled to the increase of pay while on furlough. (War Dept. Bull. 18, July 8, 1916.)

and no such certificate shall be issued to any person until an aviation examining board, which shall be composed of three officers of experience in the aviation service and two medical officers, shall have examined him, under general regulations to be prescribed by the Secretary of War and published to the Army by the War Department, and shall have reported him to be qualified for the detail or rating, or for both the detail and the rating, sought or proposed in his case. Sec. 3, id.

8891. Same-Issue of certificates of qualification.--The Secretary of War shall cause appropriate certificates of qualification to be issued by The Adjutant General of the Army to all officers and enlisted men who shall have been found and reported by aviation examining boards in accordance with the terms of this act, to be qualified for the details and ratings for which said officers and enlisted men shall have been examined. Sec. 3, id.

889m. Same-Service as aviation students prior to detail, rating requirements for military aviators, etc.-Except as hereinbefore provided in the cases of officers who are now on aviation duty and who shall be rated as junior military aviators as hereinbefore authorized, no person shall be detailed for service as an aviation officer in the aviation section until he shall have served creditably as an aviation student for a period to be fixed by the Secretary of War; and no person shall receive the rating of military aviator until he shall have served creditably for at least three years as an aviation officer with the rating of junior military aviator. Sec. 3, id.

889n. Same-Payments in case of death from accident.-There shall be paid to the widow of any officer or enlisted man who shall die as the result of an aviation accident, not the result of his own misconduct, or to any other person designated by him in writing, an amount equal to one year's pay at the rate to which such officer or enlisted man was entitled at the time of the accident resulting in his death, but any payment made in accordance with the terms of this proviso on account of the death of any officer or enlisted man shall be in lieu of and a bar to any payment under the Acts of Congress approved May eleventh, nineteen hundred and eight, and March third, nineteen hundred and nine (Thirty-fifth Statutes, pages one hundred and eight and seven hundred and thirty-five), on account of death of said officer or enlisted man. Sec. 3, id.

8890. Aviation officers, ratings of and qualifications for.-Aviation officers may, when qualified therefor, be rated as junior military aviators or as military aviators, but no person shall be so rated until there shall have been issued to him a certificate to the effect that he is qualified for the rating, and no certificate shall be issued to any person until an aviation examining board, which shall be composed

of three officers of experience in the aviation service and two medical officers, shall have examined him, under general regulations to be prescribed by the Secretary of War and published to the Army by the War Department, and shall have reported him to be qualified for the rating. No person shall receive the rating of military aviator until he shall have served creditably for three years as an aviation officer with the rating of a junior military aviator. Sec. 13, Act of June 3, 1916 (39 Stat. 175).

(For the preceding provision of this section see paragraph 879a.)

889p. Same-Rank and pay of. Each aviation officer authorized by this Act shall, while on duty that requires him to participate regularly and frequently in aerial flights, received an increase of twentyfive per centum in the pay of his grade and length of service under his commission. Each duly qualified junior military aviator shall, while so serving, have the rank, pay, and allowances of one grade higher than that held by him under his commission if his rank under said commission be not higher than that of captain, and while on duty requiring him to participate regularly and frequently in aerial flights he shall receive in addition an increase of fifty per centum in the pay of his grade and length of service under his commission. Each military aviator shall, while so serving, have the rank, pay, and allowances of one grade higher than that held by him under his commission if his rank under said commission be not higher than that of captain, and while on duty requiring him to participate regularly and frequently in aerial flights he shall receive in addition an increase of seventy-five per centum of the pay of his grade and length of service under his commission. Id.

889q. Same-Increased pay and allowances authorized in Act of March second, nineteen hundred and thirteen, repealed.-The provisions of the Act of March second, nineteen hundred and thirteen," allowing increase of pay and allowances to officers detailed by the Secretary of War on aviation duty, are hereby repealed. Id.

889r. Married officers of line of Army eligible for detail to aviation duty-Enlisted men of aviation section to be instructed in art of flying.-Hereafter married officers of the line of the Army shall be eligible equally with unmarried officers and subject to the same conditions for detail to aviation duty; and the Secretary of War shall have authority to cause as many enlisted men of the aviation section to be instructed in the art of flying as he may deem necessary. Id.

889s. Age of officers not a bar to original detail, and neither age nor rank a bar to subsequent details. Hereafter the age of officers shall not be a bar to their first detail in the aviation section of the

Par. 889, ante, or 37 Stat. 705.

Signal Corps, and neither their age nor their rank shall be a bar to their subsequent details in said section. Id.

889t. Aviator, Signal Corps, appointment of qualified civilians as.-When it shall be impracticable to obtain from the Army officers suitable for the aviation section of the Signal Corps in the number allowed by law, the difference between that number and the number of suitable officers actually available for duty in said section may be made up by appointments in the grade of aviator, Signal Corps, and that grade is hereby created. The personnel for said grade shall be obtained from especially qualified civilians who shall be appointed and commissioned in said grade. Id.

889u. Same-Pay and provision for discharge of.-Whenever any aviator shall have become unsatisfactory he shall be discharged from the Army as such aviator. The base pay of an aviator, Signal Corps, shall be $150 per month, and he shall have the allowances of a master signal electrician and the same percentage of increase in pay for length of service as is allowed to a master signal electrician. Id. (For the ensuing provision of this section see paragraph 890a.)

ADVISORY COMMITTEE FOR AERONAUTICS.

889v. Composition of.-An Advisory Committee for Aeronautics is hereby established, and the President is authorized to appoint not to exceed twelve members, to consist of two members from the War Department, from the office in charge of military aeronautics; two members from the Navy Department, from the office in charge of naval aeronautics; a representative each of the Smithsonian Institution, of the United States Weather Bureau, and of the United States Bureau of Standards; together with not more than five additional persons who shall be acquainted with the needs of aeronautical science, either civil or military, or skilled in aeronautical engineering or its allied sciences. Act of Mar. 3, 1915 (38 Stat. 930).

889w. Same-No compensation for members.-The members of the Advisory Committee for Aeronautics, as such, shall serve without compensation. Id.

889x. Same-Duty to supervise research, etc.-It shall be the duty of the Advisory Committee for Aeronautics to supervise and direct the scientific study of the problems of flight, with a view to their practical solution, and to determine the problems which should be experimentally attacked, and to discuss their solution and their application to practical questions. In the event of a laboratory or laboratories, either in whole or in part, being placed under the direction of the committee, the committee may direct and conduct research and experiment in aeronautics in such laboratory or laboratories. Id.

889y. Same-Rules of conduct for.-Rules and regulations for the conduct of the work of the committee shall be formulated by the committee and approved by the President. Id.

889z. Same-Appropriation for experimental work, etc.-The sum of $5,000 a year, or so much thereof as may be necessary, for five years is hereby appropriated, out of any money in the Treasury not otherwise appropriated, to be immediately available, for experimental work and investigations undertaken by the committee, clerical expenses and supplies, and necessary expenses of members of the committee in going to, returning from, and while attending, meetings of the committee. Id.

889aa. Same-Annual report to include itemized statement of expenditures.-An annual report to the Congress shall be submitted through the President, including an itemized statement of expenditures. Id.

889bb. Appropriation for purchase, manufacture, etc., of airships and other serial machines for the Aviation Section.-Not more than $13,281,666 of the foregoing appropriation1 shall be used for the purchase, manufacture, maintenance, operation, and repair of airships and other aerial machines and accessories necessary in the Aviation Section; and for the purchase, maintenance, repair, and operation of motor-propelled, passenger-carrying vehicles which may be necessary for the Aviation Section. Act of Aug. 29, 1916 (39 Stat. 622).

889cc. Appropriation for payment of officers and enlisted men of the Aviation Section, Officers' Reserve Corps and Enlisted Reserve Corps, when called into active service.—Of the sum last above mentioned $900,000, or so much thereof as may be necessary, will be available for paying and otherwise providing for such officers of the Officers' Reserve Corps of the Aviation Section of the Signal Corps and such enlisted men of the Enlisted Reserve Corps of the Aviation Section of the Signal Corps as may be called into active service. Id.

889dd. Appropriation for development of suitable type of aviation motor.-Not to exceed $50,000 of the above sum will be available for the payment of all expenses in connection with the development of a suitable type of aviation motor, under such regulations as the Secretary of War may prescribe. Id.

889ee. Secretary of War to receive officers and enlisted men of Coast Guard for instruction in aviation at aviation schools.-At the request of the Secretary of the Treasury the Secretaries of War and Navy are authorized to receive officers and enlisted men of the

1 The appropriation referred to is one of $14,281,766 for the Signal Service of the Army.