Selv det berømte Prince-of-Wales-barometer, en kopi af John Russels kongelige barometer, kan man få for immervæk 795 engelske pund uden det mindste spor af kviksølv.
Even the famous Prince of Wales barometer, a copy of John Russel's royal barometer, nevertheless costing GBP 795, is already available without the slightest trace of mercury.