The stem of the thermometer is not perfectly round for two reasons. One so it will not roll off and fall, and two, the flat area acts as a magnifying glass to make the hollow shaft in the stem appear larger.
because so you can read the temperature reading more clearly
So you can read it more easily.
mercury
a lab thermometer did not have a constriction as compared to clinical thermometer. it have a wide range of measurement and usually contains alcohol
Why_is_the_glass_on_the_bulb_of_a_clinical_thermometer_so_thin
By using glass.
mercury
MERCURY
Two advantage and two disadvantage of using alcohol and Mercury for thermome Two advantage and two disadvantage of using alcohol and Mercury for thermometer
Definition:It is an instrument used to measure body temperature.Diagram:Description:It is a small glass thermometer designed for clinical use in humans or animals. Designed with a narrowing small glass above the bulb so that the mercury column stays in position when the instrument is removed from the body. It is carefully calibrated at the time of manufacturing. Now a days mercury thermometer not used because it can break, spilling mercury posing a risk of human or animal health. they can be inserted in the month, armpit, anus or even attached to the forehead depending on the design.
Have you ever wondered how a magnifying glass is constructed? A magnifying glass is constructed by using a convex lens to curve and magnify objects. A magnifying glass is also constructed out of glass.
Clinical thermometers are made to be used in a hospital to accurately determine body temperature. They are often digital. Lab thermometers are made of metal or glass and usually don't give you an accurate reading as much as a "ball park." A clinical thermometer may have mercury but lab thermometers usually have alcohol .
Laboratory thermometers can measure wide variety of temperature, whereas a clinical thermometer has a range between 95 to 105 Fahrenheit. Clinical thermometers are made to be used in a hospital to accurately determinebody temperature. They are often digital. Lab thermometers are made of metal or glass and usually don't give you an accurate reading as much as a "ball park". Clinical thermometer may have mercury but lab thermometers usually have alcohol .