Explanatory notes
… usually made of glass (though some may be of metal, e.g., nickel‑silver, silver, etc.), and weighted at one end with … Bates, Gay‑Lussac, Richter, Tralle, Sikes, Stoppani, etc.). Nicholson’s hydrometer is used for solids. The heading does … based on rotatory polarisation . These consist of two Nicol prisms between which is placed a calibrated quartz …