[xsmasher]

Wait, I know this one. You give the barometer to the superintendent if he tells you the height of the building.

[jschulenklopper]

Not everyone got the Niels Bohr joke that you subtly pulled there.

[fruitplants]

It's pronounced thermometer. :-)

[Raed667]

how about stacking the barometers ?

[rzzzt]

Do I measure the passenger plane with or without the ship?