thereof, the names of the persons killed or injured, and the nature of the injuries.  If a personal injury thereafter results in the death of the person injured, as soon as such death comes to his knowledge, the owner, lessee or agent shall give notice thereof forthwith, in writing, to the chief inspector of mines, and to the coroner of the county in which such accident occurred. (Sec. 907, 921, 934, 951; Penalty, Sec. 976.)

[=Return of owner, lessee or agent.=] The owner, lessee or agent of a mine, shall, on or before the thirty-first day of January of each year, send to the office of the chief inspector of mines, upon blanks furnished by him, a correct return, specifying with respect to the year ending on the preceding thirty-first of December, the quantity of coal mined, and the number of persons ordinarily employed at, in, and around such mine, distinguishing the persons below and above ground, and give such other information as required by such blanks. (Penalty, Sec. 976.)

Sec. 941. [=Test weights to be provided.=] The owner, lessee or agent of a coal mine, at which the earnings of ten or more persons depend upon the weights of coal mined, shall provide and keep accessible for the purpose of testing the weigh scales as provided elsewhere in this act, the following standard test weights, properly sealed:  Where the coal mined is weighed upon hopper or pan scales, two standard test weights of fifty pounds each; where the coal mined is weighed upon railroad track scales, ten standard test weights of fifty pounds each. (Sec. 910.)

[=Owner, lessee or agent shall provide safety lamps.=] The owner, lessee or agent of a mine generating fire-damp, so as to be detected by a safety lamp, shall keep on hand in proper condition for use, not less than four approved safety lamps, and upon request of the district inspector of mines, shall provide such additional safety lamps as in his judgment may be required to meet any probable emergency.

[=Owner, lessee or agent shall provide shields on mining machines.=] The owner, lessee or agent of a mine, shall provide and maintain a sufficient shield on each mining machine used in such mine, as may be authorized by the chief inspector of mines, or the district inspector of mines, for the protection of those employed in operating same. (Sec. 957; Penalty, Sec. 976.)

=Signal code.=

Sec. 942. [=Signals at mines, how conducted; devices to be used.=] At each mine operated by shaft, the means of signaling to and from the bottom man, the top man, and the engineer shall consist of a tube, or tubes, or wire encased in wood or iron pipes, through which signals shall be communicated by electricity, compressed air, or other devices.  The following signals are provided for use at mines where signals are required: 

=Signal code.=

=From the Bottom to the Top.=

[=One ring or whistle.=] One ring or whistle from the bottom to the top shall signify to hoist coal or the empty cage, and also to stop either when in motion.