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Up until the 17th century, thermometers were quite basic and they didn't measure air temperature very accurately. |
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Accurate measurement of outside air temperature was not possible until the thermometer was invented during the L7th century. |
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Until the perfection of thermometers during the 17th century, measurements of air temperature were very haphazard. |
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Measurements of air temperature did not always reflect the reality until the' thermometer was perfected in the 17th century. |
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The invention of the thermometer in the 17th century allowed people to record the air temperature accurately for the first time. |