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warmth 
Roasting marshmallows over a summer campfire.
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Edmond Becquerel, Thermopile, 1866
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Sitting-Out Bag, Open Air School, 1918
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Conduction, convection, radiation, illustration
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Thermal conduction in a metal, illustration
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Thermal conduction in a metal, illustration
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Conduction, convection, radiation, illustration
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Conduction, convection, radiation, illustration
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Thermal conduction in a metal, illustration
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Heat loss from a house, illustration
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Thermal conduction in a metal, illustration
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Thermal conduction in a metal, illustration
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Neck scarf, X-ray
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Light bulb, X-ray
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Sock, X-ray
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Waterproof jacket, X-ray
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Single glove, X-ray
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Hot water bottle, X-ray
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Pair of socks, X-ray
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Gauntlet glove from side, X-ray
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A pair of gauntlet gloves, X-ray
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Happy senior friends relaxing at fire pit on hotel patio
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Man In Front Of Graffiti
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Family Drinking Hot Cocoa
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Family Drinking Hot Cocoa
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