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with the double helix structure becoming self-evident as the model is constructed
May be used to form simple words
making them perfect for overhead projectors
providing endless fun and safe entertainment for children indoors and outdoors
Suitable and useful tools for general laboratory and physics experiment in demonstrations on force and balance
Rain Gauge Glass Geology Model with the double helix structure100% brand new and high quality Features: The rain gauge measures sprinkler fall and rainfall. 5" accurate measurement for precise rain measurement. Easy to read scale in both inch and millimeters. Suitable for measurement of rainfall, lawn & garden watering Durable, weather resistant construction. This rain gauge helps you keep track exactly how much water has fallen in your garden. Insert into the ground or mount on a fence, deck or building.
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