[DOC] [TLE] Hygrometer - Wikipedia [PAR] A hygrometer /harmtr/ is an instrument used for measuring the moisture 
content in the atmosphere. Humidity measurement instruments usually rely on 
measurements of some ... These devices use a human or animal hair under 
tension. The hair is hygroscopic (tending toward retaining moisture); its length 
changes... [DOC] [TLE] Hygrometer History - The Inventors [PAR] Other kinds of hygrometers use human hair (blond) to determine moisture content
. ... Some hygrometers use the measurements of changes in electrical... [DOC] [TLE] Humidity: Where do they get the human hairs for hygrometers? - Quora [PAR] There is an average of 100.000 hairs on a human head, each growing with about 
1,5 cm per ... There are some hygrometers that measure humidity by using 
human hairs. How do they harvest them? ... I use a round brush to... Is human 
hair... [DOC] [TLE] Make a Hygrometer with Strands of Hair - Science Buddies [PAR] Did you know that strands of hair can relax and lengthen when the humidity 
increases ... To make and use a hygrometer, an instrument for measuring the 
level of... [DOC] [TLE] The History of the Hygrometer - Inventors - About.com [PAR] Jun 29, 2015 ... Leonardo da Vinci built the first crude hygrometer in the 1400s. ... Saussure built 
the first hygrometer using a human hair to measure humidity. ... Some 
hygrometers use the measurements of changes in electrical resistance,... [DOC] [TLE] How a hair hygrometer measures humidity - USATODAY.com [PAR] May 20, 2005 ... Other kinds of hygrometers use materials with electrical resistance that ... Human 
(or animal) hair turns out to be a pretty good way to measure... [DOC] [TLE] How a Hygrometer Works - Luma Comfort [PAR] If you've ever noticed how human hair tends to frizz when there is a lot of 
moisture in the air or it is very hot outside, then it will ... Hygrometers are the go-to 
source for measuring humidity. ... Some people use plants as an indicator of 
humidity. [DOC] [TLE] Types of Hygrometers and Their Uses - Hygrometer [PAR] Human hair expands in atmospheres with high humidity and contracts when 
conditions are drier. Some types of hygrometers use human hair to measure 
relative... [DOC] [TLE] Hygrometers: Guide to Use Hygrometers [PAR] Jan 10, 2013 ... The main objective is to measure the amount of moisture in the air so they ... 
Some hygrometers through the use of human hair collected and an... [DOC] [TLE] Weather Stations at Home | How to Use Hygrometers [PAR] Their primary purpose is to measure how much moisture is in the air so they are 
... Some hygrometers do this through the use of human hair which collects and... [DOC] [TLE] What is a Hygrometer ...............Uses, Preventing ... - Mold Removal [PAR] Hygrometers keep the humidity level in homes at a comfortable level. ... how 
some people experience bad hair days or get frizzy hair on very humid days? ... 
Hygrometers that use human hairs to measure relative humidity measure how 
much... [DOC] [TLE] Hair vs. Humidity; Does Hair Shorten When it is Humid? - WKRG.com [PAR] Jun 3, 2015 ... We designed a hygrometer- that's an instrument to measure relative humidity but 
we ... about 3%, but it's not perfectly 3% for the whole strand and that's why some 
hair curls. Human hair has been used in professional hygrometers since the ... 
Terms of Use  Privacy Policy  EEO Report  WKRG Children's... [DOC] [TLE] hygrometer | meteorological instrument | Britannica.com [PAR] Several major types of hygrometers are used to measure humidity. ... Mechanical 
hygrometers make use of the principle that organic substances (particularly finer 
... skin [ox gut] and human hair) contract and expand in response to the humidity. 
... which is the weight of water vapor in a certain weight of air in the atmosphere. [DOC] [TLE] Pine Cone Weather | The Happy Scientist [PAR] ... in school, we used human hair to construct a hygrometer for measuring the 
humidity in the air. ... or other small container; some glue; a piece of paper; tape; 
a pen or marker ... Use the pen to mark the position of the head of the straight pin.

Question: Some hygrometers use a human hair to measure this
Answer: (relative) humidity