Clinical Themometer This is a clinical thermometer in a nickel-plated cylindrical case. One end of the thermometer is a metal bulb. On the glass there are temperature indicators in fahrenheit, which are printed in black ink. There are also markers for each 5° increment, which are as follows: 95°, 100°, and 105°. The top temperature that can be measured is 107°F. There is also an arrow that points at the temperature which indicates the fever point of an average person, 98.4°F. Beneath the temperature gauge "½ MIN F HENNELLY MPSI NAVAN" is printed in black ink. Thermometers such as this one would have been used to measure the body temperature of a patient via the rectum. They are still in use today, although less common due to the mercury content. 1925-1975