Waiter, there's a hair in my hygrometer

Article Abstract:

Amateur scientists who are eyeing to obtain an accurate measurement of the atmosphere's humidity may make use of the human hair as a hygrometer. The rationale for this centers on the concept that hair tends to lengthen or shorten with the amount of moisture it is exposed to. A hair-driven hygrometer does not only allow users to determine the rate of evaporation with considerable precision but also monitor plants' response to light and temperature changes.

Measurement, Design and construction, Humidity, Moisture, Hygrometers

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The joys of armchair ornithology

Article Abstract:

The National Audobon Society's annual Christmas bird count has made many amateur ornithologists out of plain birdwatchers. Began in 1900 as a protest against the slaughter of birds during the holidays, the event draws over 45,000 people in 1,600 teams in North America, Caribbean and the Pacific.

Research, Appreciation, Ornithology, National Audubon Society

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Taking back the final frontier

Article Abstract:

People have increasingly become interested in amateur rocketry ever since the first man stepped on the moon. In fact, some nonprofit organizations have sponsored competitions on liquid-fueled and solid-propelled home made rockets.

Analysis, Rocketry, Solid propellant rockets, Solid fuel rockets

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