At the end of the heating period, admit dry air to the heating chamber, remove the bottle, and with the capillary stopper still in place allow it to cool in a desiccator before weighing.

• 在加热结束时，可以把干燥的空气放进干燥室内，取出称量瓶，移入干燥器，盖上毛细管塞，冷却，称重。