(71) The last interrogatory in the written interrogatories to take testimony, now commonly in use, shall in the future be altered and stated, in substance thus: "Do you know, or can you set forth, any other matter or thing which may be a benefit or advantage to the parties at issue in this cause, or either of them, or that may be material to the subject of this, your examination, or the matters in question in this cause? If yea, set forth the same fully and at large in your answer."