Mercury, also quicksilver or hydrargyrum, is a chemical element with the symbol Hg and atomic number 80. A heavy, silvery d-block metal, mercury is one of six chemical elements that are liquid at or near room temperature and pressure, and is the only metal that is liquid at standard conditions for temperature and pressure. With a melting point of −38.83 °C and boiling point of 356.73 °C, mercury has one of the narrowest ranges of its liquid state of any metal.

Mercury is used in thermometers, barometers, manometers, sphygmomanometers, float valves, and other scientific apparatus, though concerns about the element's toxicity have led to mercury thermometers and sphygmomanometers being largely phased out in clinical environments in favor of alcohol-filled, digital, or thermistor-based instruments.

Mercury in 1632Edit

Decades before the arrival of Grantville, Russian physician Guba Ivashka Kalachnikov had treated Tsar Ivan IV with mercury. After researching Grantville medical texts, Kalachnikov learned that mercury is in fact a deadly poison, and that it could cause madness in people exposed to it.[1]


  1. Grantville Gazette XI, "Butterflies in the Kremlin, Part Four"