There stay questions: how does the thermometer that is used, when I'm sick hold its temperature? How does the min-max-thermometer present to me its extreme showings at day and night? An elder person can explain it: I see!



When I was young I wondered about those bimetal-thermometers (with the needle in front, and, when you open it, a spiral behind). How does it do? I needed a book as you cannot see the tricky structure of the spiral. But observed, touched, cautiously moved - I see!

move on