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Why use l kaho, or mercury fill in po glass thermometer, because these two liquids are sensitive to changes in temperature and not the skin of glass tubes island. But if it is a different type of liquid, such as water Koh phi wonlot glass. Etc.

Why use alcohol or mercury contained in the bulb's glass thermometer meter because the liquid is sensitive to both the temperature and the surface of the glass tube. If the fluid is a liquid, such as water sports, glass surface. When the expansion or contraction will not get stuck in the tube back and read the hard bulb and so on.

Why use alcohol or mercury in glass thermometer bulb used because both liquid is sensitive to the change of temperature and not the island surface of the glass tube. But if other types of liquid such as water to the island skin whales glass tube.And so on.