(b) The secretary, with the consent of the Governor, shall have the authority to purchase, through the Department of Property and Supplies, one truck equipped with the necessary breathing apparatus, gas masks, first-aid supplies, analytical apparatus and such other chemical and scientific instruments commonly used and necessary in the work of first aid and mine rescue. The secretary, with the consent of the Governor, shall also have the authority to purchase, through the Department of Property and Supplies, such emergency mine rescue trucks and equipment as in his opinion shall be deemed necessary for use in mine catastrophies.