Category: Sphygmomanometer
Estimated Date: 1914
Name: Oliver pocket mercurial manometer
Manufacturer: Hawksley and Sons

Description: Two pieces, when closed looks like a wooden box, 9.5×1×1.5. The bottom half opens up into a crossed stand which the manometer fits into to stand. The manometer has two scales, one for lower reading and another for high readings with a screw to open the top portion to the tube. The glass is bent at both ends with reservoir in the end of one arm. A beautiful design and very compact for carrying in the pocket. Unfortunately relying on both a U tube design and pressure adjustment on the upper end, it was probably quite inaccurate. Oliver designed other instruments and also wrote a book on the subject cited below.

Reference 1: 398

Oliver pocket mercurial manometer
Riva-Rocci Sphygmomanometer
Sphygmomanometer, Baum, Cabinet Model
Baumanometer, kit bag model
Sphymomanometer, Collens Sphygmooscillometer