Estimated Date: 1913
Name: Dr. Oliver’s Portable Mercurial Compressed Air Manometer
Manufacturer: Hawksley and Sons, The Beard Co.
Description: 8“x 1.5” x1.25” cherry wood box contains a 7” wooden ivorine covered scale calibrated to 300 with a closed manometer consisting of a reservoir with side arm to rubber tube which connected to cuff, straigt upright arm to a bulbous ending which is closed to the air. Held in place with metal bands. Small eye screw at top and 3.75” arm folds out at back to hold at 30 degree angle. Instructions in the lid.
Reference 1: 398