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have bedroom eyes
80 x 100 cm
Butterfly specimen (Graphium agamemnon
Butterfly specimen (Papilio karna
Philippines) mounted on acid-free paper in a black wooden shadow box
Solar Radiometer Beetles & Others have bedroom eyesInvented in 1873 by chemist & experimenter Sir William Crookes, the solar radiometer was the first way in which man could demonstrate light as an energy source. The radiometer consists of an airtight glass bulb, containing a partial vacuum. Inside are a set of metal vanes which are mounted on a spindle. When exposed to sunlight, artificial light, or infrared radiation, the vanes turn with no apparent motive power, the dark sides retreating from the
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