AN ACT AMENDING ACT NUMBERED TWELVE HUNDRED AND FIFTY-EIGHT, ENTITLED "AN ACT MAKING ADDITIONAL PROVISIONS TO THOSE CONTAINED IN ACT NUMBERED ONE HUNDRED AND NINETY, RELATING TO THE EXERCISE OF THE RIGHT OF EMINENT DOMAIN IN CASES WHERE THE EXERCISE OF SUCH POWER IS INVOKED BY A RAILROAD CORPORATION FOR THE PURPOSES OF CONSTRUCTING, EXTENDING, OR OPERATING ITS LINE."