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.
Hero: Army Staff Sgt. Travis Mills, left, has had both his arms and legs amputated after he stepped on an IED while on patrol in Afghanistan last week. He is pictured in hospital with brother-in-law Josh Buck.