Where there is a dispute between the parties as to the propriety and materiality of the interrogatories, or any of them, and they are unable to reach an agreement concerning the same, the usual practice is for the dissatisfied party to make specific objection to such interrogatories as he deems improper, and to give due notice to his opponent that, at a specified time and place, he will appear before the court and have the materiality and propriety of such interrogatories passed upon and settled by the court. The determination of this question by the court is called "settling the interrogatories." The precise ground of the objection to each interrogatory should be specified, so as to give the propounder an opportunity to amend before the commission issues.

The authorities seem to be hopelessly in conflict on the question as to whether both oral and written interrogatories may be used in the same deposition.

The interrogatories should be attached to the commission, although it has been held that the failure to do so is not fatal.18