If mounted, they will form on the other flank. If both engineers and signal corps troops are together, the former, for ceremonies, will form on the right of the latter. (Circ. 36, W. D., 1906.)

63. The army and navy code (Myer) was prescribed for all visual signaling by General Orders, No. 32, Adjutant-General's Office, August 1, 1896.

64. All signal corps special vehicles will be painted an olive-drab color.

The following is the formula for mixing the olive-drab paint to be used:

65. The insignia of the Signal Corps, according to the design herewith, will be painted in a suitable place on all special vehicles, pack chests, etc., belonging to the Signal Corps.

MILITARY TELEGRAPH LINES.

66. When telegraph lines are placed under charge of signal officers, they will be held responsible for their construction, maintenance, and operation. Commanding officers and others will see that the special duties of these officers are not interfered with, and upon proper application will render any assistance in their power. (A. R., 1579.)

67. Communications transmitted by telegraph or signals are always confidential, and will not be revealed except to those officially entitled to receive them or in cases specially ordered by competent military authority. (A. R., 1580.)

(a) Dispatches containing matter deemed to be injurious to the public interests must be submitted to the commanding general for his orders relative to their transmission. On detached lines such messages will be submitted to the senior officer or noncommissioned officer for his action.

(b) Officers and soldiers are strictly prohibited from communicating, except to commanding officers or under special authorization from proper military authority, information by telegraph or otherwise relative to numbers, movements, or operations of troops, or details regarding fortifications, armaments, or experiments made in connection with military affairs. Neither shall they be permitted to file or send dispatches containing opinions on military operations or other military matters relating to any part of the army or command with which they are serving or to any auxiliary forces.

(c) Personal and press messages may, under conditions not interfering with military business, be transmitted free over field military telegraph lines that are closed to the general public.

(d) The use of any cipher is forbidden, except in communication to and from commanding officers and their superiors, or in cases of civil officers specially authorized. Personal and press codes, however, may be utilized for the economical transmission of dispatches upon filing a copy of the code with the central office and under such other regulations as may be formulated by the general commanding an army in the field.

(e) The chief signal officer of an army operating in the field, or of a district under military control, in carrying out his general instructions will formulate necessary regulations for the management and operation of military telegraph lines under his control. General rules should be reduced to writing, be clearly defined, and impartially enforced. (Extract A. R., 1581.)

68. General Order No. 9, Adjutant-General's Office, 1899, directs that only such words be used in cable dispatches as are necessary to a clear comprehension of their contents, and prescribes certain code addresses for chiefs of bureaus and others of the War Department.

69. The requirements of paragraphs 1192, 1195, 1196, 1580, and 1581, Army Regulations, are held to be applicable to official telegrams sent over the United States military telegraph lines in Alaska and the Philippine Islands. These lines will be used only in cases of necessity, in which the delay consequent upon the transmission by mail would be prejudicial to the public interests. In order to secure economy officers are expected to observe the same degree of brevity in framing official messages as in the preparation of private telegrams.

70. The provisions of section 2, paragraph 1194, Army Regulations, with reference to the necessity of an officer submitting an explanation when it is questionable whether a telegram is on official business or whether the telegraph should have been used, are extended to telegrams sent over military telegraph lines in Alaska and the Philippine Islands. In case such explanation is not satisfactory the officer filing the telegram will be charged therefor at the authorized commercial rates.

71. Official telegraph blank forms (blue) are supplied by the Quartermaster's Department and not by the Signal Corps. These forms are for all messages which pass over any commercial telegraph line.

72. An official copy of all serial orders issued by officers in charge of military telegraph lines must be forwarded to the Chief Signal Officer for his information on the date of issue.

73. At every permanent station of the Signal Corps the word "Signals" will be the official address of the senior officer, noncommissioned officer, or civilian employee present, and telegraph

companies, post-offices, and other proper persons should be duly notified. When telegrams are sent to individual officers, the surname of such individual will precede the word "Signals.'

74. Officers in charge of divisions of military telegraph lines in the United States and Alaska, who, under existing orders, render accounts current of telegraphic receipts to the Chief Signal Officer of the Army, will hereafter furnish to the chief signal officer of the department in which the lines may be located or to those officers specially designated to have charge of these lines a copy of their monthly account current without vouchers. This copy will be forwarded at the same time as the copies sent to the Chief Signal Officer of the Army.

75. The signal officer to whom the copies mentioned in the foregoing paragraph are forwarded will keep in his office a ledger account showing the amount received each month by each officer, the amount transmitted or deposited, the amount remaining on hand, and such details as may be considered necessary.

76. It will be a part of the duties of the department chief signal officer or other designated officer to see that the officers and noncommissioned officers responsible for telegraph receipts deposit or transfer these receipts promptly. In case of delays proper instructions should be issued to correct such delinquencies and prevent their

recurrence.

77. Accounts current relating to the Philippine telegraph system will be forwarded to and adjusted in Manila in such a manner as the chief signal officer of the division may direct. He will, however, forward to the Chief Signal Officer of the Army an abstract showing the total amount received, transferred, deposited, etc., for each month, the above abstract to be forwarded as soon as the accounts for all stations have been examined and adjusted..

WAR DEPARTMENT TELEGRAPH CODES.

78. The regulations concerning care and accountability for War Department telegraph codes at posts are set forth in paragraph 1193, Army Regulations, 1907.

79. The War Department telegraphic code, 1906, will replace the telegraphic code to insure secrecy (Gregory), the War Department telegraphic code of 1900, and the cipher of the War Department for official telegraphic code messages sent on and after November 1, 1906, except that the cipher of the War Department may be used after that date for correspondence in such cases only as may be authorized by the Secretary of War. (G. O., 177, W. D., 1906.)

80. All copies of the telegraphic code to insure secrecy and of the War Department telegraphic code of 1900 with appendixes, together

with such copies of the cipher of the War Department as are no longer needed, will be returned to Adjutant-General of the Army, (G. O., 177, W. D., 1906.)

81. The duplicate memorandum receipt for the War Department telegraphic code, 1906, and the semiannual report accounting for copies of that code shall be forwarded directly to the Chief Signal Officer of the Army. The semiannual report will hereafter be rendered on June 30 and December 31 of each year. (Extract Par. II, G. O., 93, W. D., 1907.)

FIRE-CONTROL INSTALLATIONS.

82. The Signal Corps will supply all instruments for communication. This will include all kinds of telephones, telegraphs, telautographs, and megaphones which may from time to time be prescribed, with their primary and storage batteries, storage-battery switchboards, motor generators, boosters, and the necessary cables of all kinds required for operating and interconnecting them. It will also supply electrical clocks, time-interval bells, firing signals, zone signals, aeroscopes, field glasses, telescopes (other than battle, fire, and mine commander's telescopes), and meterological instruments. It will furnish and install all submarine cables for communication, including the construction of cable terminals, but excluding cover for the terminals or the cable approaches. It will also furnish all cable for communication by overhead or underground lines and the necessary terminal boxes. In case of underground lines the cable will be placed in trenches or ducts by the engineer department. In case of overhead lines they will be installed by the Signal Corps. When practicable, any pole lines which have been installed by the engineer department for light and power wires may, with the consent of that department, be utilized by the Signal Corps for any of these wires. It will supply each garrisoned coast artillery post having a standard fire-control installation with the following equipment: One electrical engineer's tool chest, one inspector's pocket kit, and one tool bag. To each coast artillery post equipped with a provisional fire-control installation it will supply a post tool chest.

The engineer department will furnish searchlights and the electric power current required for all fire-control purposes (except that derived from signal corps storage batteries installed to operate telautographs).

For fortifications in general the Signal Corps will supply all the necessary lines and means of electrical communication, including telephones, dial and other telegraphs, wiring all necessary electrical instruments not permanently attached to the switchboard, including