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目前各地利用稻草或野生植物造棉花的很多。为了測定一下它的保溫能力。可用兩个較大型玻璃試管,將其中的一个松松地放滿人造棉。另一个則放滿原棉,兩管口都用軟木塞塞緊,在塞中心各插入一只溫度計(最好是用体溫計)。測得棉花的溫度,記錄下來。然后將兩管同时浸在50℃的溫水中,经过一定时間,看兩个試管中温度計的示度,溫度升得多的保溫能力低;兩管溫升極接近,
The current use of straw or wild plants make a lot of cotton. In order to measure its thermal insulation ability. Two larger glass tubes are available, one of which is loosely covered with synthetic cotton. The other one is filled with raw cotton, with two corks tightly closed with corks, insert a thermometer in the plug center (preferably with a thermometer). Measured cotton temperature, recorded. Then the two tubes are immersed in warm water at 50 ° C at the same time, and after a certain period of time, the thermometers in the two tubes show a low degree of thermal insulation; the temperature rise of the two tubes is extremely close,