Nowadays manufacturers will often use a thermostat bath or solid block where the temperature is held constant relative to a calibrated thermometer. Other thermometers to be calibrated are put into the same bath or block and allowed to come to equilibrium, then the scale marked, or any deviation from the instrument scale recorded.
Amy Winehouse 's boyfriend Reg Traviss has said the late singer had no interest in drugs during their time together.
But in Chet Baker, his life and music by author Jeroen de Valk, Russ Freeman and others state that he was on drugs from the early '50s on. Freeman was Baker's pianist and musical director for a few years after Baker had left Mulligan's quartet.