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・ Auxa perroti
・ Auxa pulchra
・ Auxa rufoflava
・ Auxa scriptidorsis
・ Auxa sericea
・ Auxa subdivaricata
・ Auxa subobliquata
・ Auxa subtruncata
・ Auxa unicolor
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Auxanometer
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・ Auxelles-Haut
・ Auxenochlorella
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・ Auxentius of Bithynia
・ Auxentius of Durostorum
・ Auxentius of Milan
・ Auxentius of Mopsuestia
・ Auxerre
・ Auxerre Cathedral
・ Auxerre – Branches Aerodrome
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Auxanometer : ウィキペディア英語版
Auxanometer

An auxanometer (Gr. ''auxain'', "to grow" + ''metron'', "measure") is an apparatus for measuring increase or rate of growth in plants.
In case of an arc-auxanometer (see picture), there is a wire fixed with the plant apex on one end and a dead-weight on the other. It passes over a pulley which has a pointer attached to it. When the plant's height increases, the pulley rotates and the pointer moves on a circular scale to directly give the magnitude of growth.
Sensitive auxanometers allow measurement of growth as small as a micrometer, which allows measurement of growth in response to short-term changes in atmospheric composition. Auxanometers are used in the laboratory,〔 the field, and the classroom.
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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