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and all the materials (and ideas) needed to make 3D card models of butterflies
45cm by 30cm
a combination of da Vinci's famous aerial screw and less well-known bevel gearing
Has alarms for both temperature and humidity
Pocket portable
Goethe Barometer Aerial Action and all the materials (andA decorative but also practical weather instrument that can predict weather changes. The glass weather ball or Goethe barometer displays fast air pressure changes. With increasing air pressure (good weather), the water level in the spout falls; with decreasing air pressure (bad weather), it rises. The barometer is filled with distilled or boiled and cooled water. Colour tablets (food colouring) in different shades included.
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