Ice Box
A box or chamber used when adjusting chronometers and fine watches for temperature. It is usually built in the form of a double box, the ice being placed between the two boxes and both boxes hermetically sealed, so that the movement may not come in contact with damp air. The outer box is provided with a drain pipe for carrying off the water and plate glass is inserted in the front of each box, so that the movement may be viewed without removing it from the box. The cover of the inner box should not be removed for at least two hours after it has been removed from the ice chamber in order to protect the steel work from rust caused by the condensation of the air in the cold metal.