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.
I think you have some of your facts wrong. First off, Jim Morrison probably snorted heroin thinking it was cocaine. Jim hated heroin and he did not like the fact Pamela was a junkie. Toward the end of his life, his drug of choice was alcohol. I understand he did do coke sometimes, but not that often.