What is the primary use of a glass thermometers with a rounded, stubby tip?

The primary use of glass thermometers with a rounded, stubby tip is for taking rectal temperature. This design is specifically intended to facilitate safe and accurate insertion into the rectum, where temperatures tend to be slightly higher and provide a reliable measurement of body temperature. The rounded tip reduces the risk of injury during the process, making it suitable for rectal use.

In contrast, thermometers designed for oral temperatures typically have a longer, more slender tip to accommodate placement under the tongue comfortably. For axillary temperatures, a different type of thermometer might be used as it measures the temperature in the armpit, which can require a different shape or style considering the location. Skin temperature measurements often use infrared devices that do not require contact with the skin or are designed specifically for that purpose, rather than using a glass thermometer that is intended for more direct applications.