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1998 WWLPT Environmental Institute: Humidity
Hair Hygrometer
by Kathy Gueltzow
Coral Springs Middle School
Coral Springs, Florida
Invented in 1783 by Horace Benedict de Saussure -
Swiss scholar
Construction:
*sheaf of blond human hairs linked mechanically to
a pointer on a dial
*dial calibrated to read in percent relative humidity
Activity 2
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