FARGO — The principal of a liquid-in-glass ... mercury. In actuality, this liquid is more often alcohol than mercury. Mercury is toxic to the touch and would be dangerous should the thermometer ...

Taking your temperature with an oral thermometer is becoming outdated. It's accurate, but who wants to stick a glass tube full of mercury in their mouth? Even if this isn't true, oral temperature ...

You probably want to do oral for kids over the age of five ... with it if you're unsure of how to use it. DON'T use a glass mercury thermometer because they've been known to break.