Why Mercury consider as an ideal liquid for thermometer What is clinical and laboratory tharmometer

Question 

Why Mercury consider as an ideal liquid for thermometer ? 

answer :

 i) mercury is shiny liquid metal and therefore can be easily seen 

ii) mercury does not stick to glass .                                  

iii) it expand and contract uniformly with a rise on fall ,

iv) mercury  freezs at approx   - 39 degrees Celsius and boil at 357 degrees Celsius

Difference between laboratory and clinical thermometer

clinical thermometer 

i) use for shorter measurments

ii) range 35degrees Celsius to 42 degrees Celsius

iii) reading take place after removing from body 

iv) it can be place  any below the tounge and arm

laboratory thermometer 

i)  use for larher measurments  

ii) temprature range 0 degrees Celsius to 100 degrees Celsius

iii) bulb remain incontact with  body 

 

What is clinical and laboratory tharmometer?