D. G. M.: To square our actions by the rule of virtue, and prove our work.
G. M.: Apply the implement of your office to that portion of the stone that needs to be proved, and make report.
The Square is applied to the four corners.
D. G. M.: Most Worshipful Grand Master, I find the stone to be square. The Craftsmen have done their duty.
G. M.: R. W. Senior Grand Warden, what is the proper implement of your office?
S. G. W.: The Level.
G. M.: What are its Masonic uses?
S. G. W.: Morally, it teaches Equality; and by it we prove our work.
G. M.: Apply the implement of your office to that portion of the corner-stone that needs to be proved, and make report.
Level is applied to the top surface.