(b) It shall be the duty of the secretary to take charge of, and preserve in his office the annual reports of the mine inspectors, and transmit a synopsis of them, together with such other statistical data compiled therefrom, and other work of the department as may be of public interest, properly addressed to the Governor, to be transmitted to the General Assembly of this Commonwealth, on or before March 15 in each year. It shall also be the duty of the secretary to see that said reports are placed in the hands of the public printer or others equipped to reproduce same, for publication, on or before April 1 in each year; the same to be published under the direction of the secretary. In order that the secretary may be able to prepare, compile and transmit a synopsis of his annual report to the Governor within the time herein specified, the mine inspectors are hereby required to deliver their annual reports to the secretary on or before February 20 in each year. In addition to the annual reports herein required of the mine inspectors, they shall furnish the secretary monthly reports, and also such special information on any subject regarding mine accidents, or other matters pertaining to mining interests, or the safety of persons employed in and about the mines, as he at any time may require or may deem necessary in the proper and lawful discharge of his official duties. The secretary shall also establish, as far as may be practicable, a uniform style and size of blanks for the annual, monthly and special reports of the mine inspectors, and prescribe the form and subject matter to be embraced in the text and the tabulated statements of their reports. The secretary is hereby authorized to make such examinations and investigations as may enable him to report on the various systems of coal mining in the Commonwealth, method of mining, ventilation and machinery employed, the circumstances and responsibilities of mine accidents, and such other matters as may pertain to the general welfare of coal miners and others connected with mining, and the interests of mine owners and operators in the Commonwealth.