Similarities of laboratory thermometer and clinical thermometer
(i) Both thermometers consist of long narrow uniform glass tubes. (ii) Both have a bulb at one end. (iii) Both contain mercury in bulb. (iv) Both use the Celsius scale on the glass tube.
(i) A clinical thermometer reads temperature 35°C to 45°C while the range of laboratory thermometer is −10°C to 110°C (ii) The clinical thermometer has a kink near the bulb while there is no kink in the laboratory thermometer. (iii) Due to kink mercury does not fall down on its own in clinical thermometer.