Dial Gauge Used for Measuring Work
Measuring thin work with dial gauge A attached to a special, inclined stand B for quick reading. The needle of indicator C is set at zero when measuring paint D is in contact with the face of the stand. To gauge work, raise point D by lever E. Place work F under the spindle and lower point to work by releasing lever E. The reading on the dial gives the exact thickness of the disk.
Smith, Robert H. Book of Advanced Machine Work (Boston, MS: Industrial Education Book Company, 1919) 1329