Need help for an antique thermometer

[cogar]

Now I wasa thinking that that thermometer was probably a “specialized” one for use in a laboratory, testing facility or production facility given the fact that its “marked” graduations range from 3.5 (F/C) to 4.1 (F/C) with the 3.7 being the critical one.
 

[Mat]

Cogar, I would not think so, The range of 35 - 42 degree Celsius is the range of temperature a human has, with 36.7 degree as the approximate normal temperature.

[cogar]

OOPS ..... my bad, ....... I thought about converting it to Fahrenheit but was lazy.

[mart]

So 37.6 is our 98.6 ??

[Mat]

Google tells me that 98.6 Fahrenheit is 37 Celsius...

[mart]

Thats close enough for government work as they say !!  Thanks Mat !!