This rule is for the "19" order what Rule 510 is for the other, and no additional remarks are needed.
Rule 513.—The order, the "O K" and the "complete" must each, in transmitting, be preceded by "31" or "19," as the case may be, and the number of the order; thus, "31, No. 10," or "19, No. 10." In transmitting the signature of a conductor it must be preceded by "31," the number of the order, and the train number; thus, "31, No. 10, Train No. 5." After each transmission and response the sending operator must give his office signal.
Here is prescribed the succession in which the signals, etc., shall be transmitted. For the "office signal," which the operator is required to give after each transmission and response, some substitute the personal signal of the operator, which is usually one or more letters assigned, by which the operator shall be known, and indicates at the same time the operator and the office where he is known to be on duty.
Rule 514.—The operator who receives and delivers an order must preserve the lowest copy. On this must appear the signatures of those who sign for the order, and on it he must record the time when he receives it; the responses; the time when they are received; his own name; the date; and the train number; for which places are provided in the blanks. These copies must be sent to the Superintendent.
The subjects treated of in this rule have been sufficiently considered in former remarks.
Rule 515.—Orders used by conductors must be sent by them daily to the Superintendent.
This provision affords an opportunity of examining orders that have been used, and of ascertaining whether they have been prepared and issued in accordance with the rules.
Rule 516.—Enginemen will place their orders in the clip before them until executed.
This rule supposes that a place has been provided on each engine for placing orders conspicuously before the engineman who is to execute them. This is a very important provision. If he has to put them in his box or pocket they may be rendered illegible, or forgotten or lost.
Rule 517.—For orders delivered at the Superintendent's office the requirements as to record and delivery will be the same as at other points.