Sec. 936. [=Addition to map, and certificate of engineer and mine-foreman.=] The owner, lessee or agent of a mine shall cause to be made, a map or an addition to the next previous map thereof, annually, and semi-annually if so directed in writing by the chief inspector of mines, showing the excavations and the information required by the preceding section, to date of survey.  The map, or maps, required by this and the preceding section, and any addition thereto, shall have the certificate of the engineer making same, and of the mine-foreman in charge of the mine at the time of the survey, acknowledged before, a notary public or justice of the peace, thereon in the following form: 

I, the undersigned, hereby certify that this map is correct, and shows all the information required by section nine hundred and thirty-five of the General Code, and covers the period ending ..............................................

............................. 
Engineer.

Acknowledged before me a ...................... this
.............. day of ......................................

.............................

I, the undersigned, hereby certify that I am a mine-foreman at the mine represented by this map, and to the best of my knowledge and belief the same correctly represents the excavations of the mine for the period ending ..........................
..................................

............................. 
Mine-Foreman.

Acknowledged before me a ....................... this
................ day of ....................................

.............................

(Sec. 904, 917, 937; Penalty, Sec. 976.)

Sec. 937. [=Owner, lessee or agent shall file map of abandoned mine with county recorder and chief inspector of mines.=] The owner, lessee or agent of a mine, before the pillars are drawn previous to the abandonment of a mine, or any part thereof, shall cause to be made a correct map of such mine, or part thereof, showing its area and workings to the day of the abandonment; the pillars drawn previous to abandonment; and file such map within ninety days after the abandonment of such mine, in the office of the Recorder of the county where such mine is located, and with the chief inspector of mines at his office.  Such map shall have attached thereto the usual certificate of the mining engineer making it, and the mine-foreman in charge of the underground workings of the mine, and such owner, lessee or agent shall pay to the Recorder for filing such map, a fee of fifty cents. (Sec. 921.)

[=Copy of map to be filed with chief inspector.=] The owner, lessee or agent of a mine shall keep at the office thereof, open to the inspection of the chief inspector of mines, and the district inspector of mines, a copy of the latest map of such mine, with any addition thereto, and shall furnish a copy thereto to the chief inspector of mines at his office. (Sec. 904, 917, 935, 936; Penalty, Sec. 976.)